Trantec S4.10L UHF Wireless Beltpack & Lapel Microphone System with 16 Frequencies - CH38 or CH70
The Trantec S4.10L is a professional UHF Wireless Beltpack and Lapel Microphone System with 16 selectable frequencies, fully synthesised PLL quartz tuning and antenna diversity reception — available in Channel 38 or Channel 70, delivering reliable hands-free wireless audio for presentations, fitness instruction, theatre and events.
The Trantec S4.10L is a robust and reliable professional UHF wireless beltpack microphone system designed for any application where hands-free wireless audio is required — including presentations, conferences, fitness instruction, theatrical productions, houses of worship, schools and a wide range of event and installation applications. Built around Trantec's fully synthesised PLL quartz tuning technology, the S4.10L delivers stable, interference-free UHF wireless performance with 16 selectable frequencies and support for up to 10 simultaneous channels — making it equally well suited to single microphone applications and larger multi-channel setups requiring several wireless systems operating concurrently.
The S4.10L is available in two frequency variants — Channel 70 and Channel 38 — please select your required version before adding to basket. Channel 70 operates within the licence-free UHF band, requiring no PMSE licence for use in the UK. Channel 38 offers an alternative frequency option and requires a PMSE licence for operation. Both variants deliver the same professional performance and feature set.
Reliable Diversity Reception
The S4.10L receiver features antenna diversity operation with a detachable antenna, ensuring consistent signal reception and minimising dropouts as the performer or presenter moves around the stage or venue. Receiver LEDs provide clear real-time monitoring of AF peak level, RF level and diversity channel A or B status — giving the operator a clear and instant overview of system performance at all times. Three squelch systems — Tone SQ, Carrier SQ and Noise SQ — work together to ensure a clean, noise-free output signal. The compact professional metal receiver chassis measures 215 x 39 x 102mm and can be used freestanding or rack-mounted in a standard 19" rack enclosure, with options for single or dual receiver mounting for permanent venue installations.
Compact Beltpack Transmitter
The S4.10L beltpack transmitter is an exceptionally compact and lightweight unit, measuring just 62 x 100 x 25mm and weighing only 85g with battery — small and light enough to be worn comfortably throughout an entire performance, presentation or fitness session without distraction. Powered by a single AA alkaline battery, the beltpack provides approximately 10 hours of continuous use on a single battery — more than sufficient for a full day of back-to-back sessions without interruption. The transmitter delivers 10mW of RF carrier power for stable wireless transmission.
Versatile Receiver Connectivity
The S4.10L receiver provides both balanced XLR (-20dBu) and unbalanced ¼" jack (+10dBu) audio outputs for straightforward connection to a wide range of PA amplifiers, mixers and installed audio systems, making it compatible with virtually any professional audio setup.
Trantec S4.10L Key Features:
- 16 Selectable Frequencies: Comprehensive frequency selection for interference-free operation in busy RF environments.
- Up to 10 Simultaneous Channels: Supports multi-microphone environments with up to 10 channels operating concurrently.
- Fully Synthesised PLL Quartz Tuning: Stable, reliable and interference-free UHF wireless performance.
- Antenna Diversity Reception: Minimises dropouts and ensures consistent signal reception across the performance or event space.
- Three Squelch Systems: Tone SQ, Carrier SQ and Noise SQ for a clean, noise-free output signal.
- Channel 70 or Channel 38 Available: Licence-free Channel 70 or Channel 38 (PMSE licence required) — select your required version before adding to basket.
- Approximately 10 Hours Battery Life: Single AA alkaline battery in the beltpack for a full day of performances or sessions.
- Compact Lightweight Beltpack: Just 85g with battery and 62 x 100 x 25mm for comfortable all-day wear.
- Balanced XLR & Unbalanced Jack Outputs: Flexible receiver connectivity for PA systems, mixers and installed audio.
- Receiver LED Monitoring: AF peak level, RF level and diversity channel A/B status indicators.
- Professional Metal Receiver Enclosure: Robust construction for reliable long-term use in professional environments.
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19" Rack Mountable: Single or dual receiver rack mounting option for permanent venue installations.
Specifications:

View our shipping and delivery information below. All prices include VAT.
Important notice for non-UK orders: Any order being shipping outside of the UK will incur an import tax. See below for more information.
Cut-off Times
Orders must be placed before 3:30pm to guarantee same-day dispatch. Any orders placed after this time are not guaranteed to be shipped the same day, and are more likely to be shipped the next working day.
To guarantee Saturday Delivery, orders must ideally be placed before 2pm.
We operate during office hours, Mon-Fri, 9am - 5pm, and are closed during the weekend.
Orders placed over the weekend or Friday after cut-off will be processed and shipped the following Monday (or Tuesday during bank holidays).
Mainland UK Delivery Charges
Note: Next-day services are classed as working days (Mon-Fri) and do not include weekends. Please choose Saturday delivery if you require the item over the weekend.
Please also note orders with a high number of boxes may be subject to an additional charge.
All delivery options will be available at the checkout stage. Please ensure you add a mobile number to your order for tracking information.
Offshore & International

We ship to Scottish Highlands, Islands, Ireland and the EU. Please see the table below for base prices. Please note that these prices are subject to change based on the number of boxes.
The following postcodes fall under 'Highlands & Islands', and are subject to the above rates/lead time.
- Scottish Highlands: FK17-21, IV1-39, IV52-54, IV63, KW1-14, PA21-40 (excluding PA38), PH19-26, PH30-41, PH49-50
- Scottish Islands: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA38, PA41-49, PA60-78, PH42-44, ZE1-3
If a UK Mainland next-day service is selected at checkout, please be aware that it won't be sent on that service.
If you require a next-day service to Northern Ireland and the highlands, get in touch so we can assist further.
EU Import Tax
Any goods shipped outside of the UK, over a certain value, will incur an import tax. The cost and rate will depend on the country and the order value.
This is a legal requirement and MUST be paid prior to delivery in order to receive your goods. You will be contacted by the courier once the order is dispatched to pay the fee.
Failure to pay import tax when applicable will result in the order being shipped back to Audio Volt. Any returned goods sent back to us due to non-payment of import tax are NOT ELIGIBLE for a refund on the shipping charge.
You can obtain an import duty estimate here.
Delivery Notes
On delivery, you must inspect the goods carefully for damage as Audio Volt is unable to accept responsibility for damage in transit, shortage of delivery or loss of products unless the customer advises Audio Volt of such within three working days from the date of delivery.
60 Day Returns Policy
We ask that you follow these guidelines to help us process your return as quickly and efficiently as possible:
- Please keep your order reference to hand. This confirms your original order and gives us the necessary details to authorise the product's return.
- Contact our Customer Services Team on 02476 369890 (or email info@audiovolt.co.uk). We will then send you an RMA number and a returns form, which needs to be completed and sent back with the returned item(s).
- If the order has been unpacked, re-package it to ensure that it is being returned in its original condition. Please make sure all items relating to the product are returned, including manuals and cables.
- When returning an item, please obtain a proof of postage receipt from the courier.
Returned items must be mailed within 10 days of when the RMA number has been issued. Items received with a post date 30 days after your requested return will NOT be eligible for refund.
Please note: our returns policy is quite straightforward, but there are a number of conditions that we ask our customers to comply with before applying:
- It is your responsibility to request a return. If you don't tell us you want to make a return, we don't know. Once you do tell us, we will do everything we can to action it.
- If you have not requested a return within 60 days of receiving an order, we will assume that you are intending to keep it, and we will not authorise a return.
- We always refund the payment according to how the original purchase was made and aim to do so within 72 hours of the return being received by us.
- Returned goods are liable for a restocking fee of 15% towards handling and repackaging if the order is not returned in its original, unopened packaging. This charge will be subject to our inspection of the returned goods.
- Delivery charges will not be refunded unless the delivered goods are faulty.
- Replacement products are dispatched immediately after the returned goods have been received and accepted by Audio Volt.
- Items that develop a fault within 30 days of delivery are eligible for a replacement or a refund. Delivery costs are also reimbursed for faulty items. Please contact our Customer Services Team on 02476 369890 if you believe your item has developed a fault.
Finally, please remember that notifying us of your intention to apply for a return, saving the delivery paperwork and keeping the order in its original packaging will help both you and Audio Volt to process the return quickly.
Any Questions?
If you have any questions about our returns policy, please telephone us on 02476 369890 or email us at info@audiovolt.co.uk.
We operate during office hours, Mon-Fri, 9am - 5pm, and are closed during the weekend.
