JTS R-4TBM / CM-501 Wireless Transmitter & Cardioid Lavalier Microphone

Wireless Beltpack Transmitter with Lavalier Microphone

The JTS R-4TBM with CM-501 is a professional-grade UHF wireless beltpack and lavalier microphone package designed for clarity, durability, and flexibility. Suitable for presentations, theater, worship, and live sound, this combo delivers stable signal transmission and high-quality vocal pickup in a compact, road-ready format.

JTS R-4TBM Competitive Differences

• 3000 user-selectable frequencies with 108MHz wideband coverage
• Includes CM-501 cardioid lavalier mic with 130dB SPL handling

JTS R-4TBM with CM-501 Description

The JTS R-4TBM bodypack transmitter is built to meet the demands of modern wireless environments. With 2400 to 3000 selectable UHF frequencies and 15 preset groups of up to 63 compatible channels, it offers maximum flexibility for multi-channel systems. Operating in the 506–542 MHz band, it ensures interference-free performance with PLL-synthesized tuning and adjustable RF output (Low/High). Housed in a durable aluminum alloy chassis, the R-4TBM features an LCD display with real-time indicators for group, channel, frequency, battery status, gain level, and user ID. Its Lock-On function prevents accidental or unauthorized changes during operation—ideal for high-stakes environments like corporate events or stage productions. Paired with the included CM-501 lavalier microphone, users benefit from clear, natural vocal capture via a cardioid pickup pattern and 130dB SPL capability. The CM-501’s low-profile form factor and clip-on design make it ideal for discreet speech applications. Compatible with a wide range of headset, instrument, and lapel microphones via its 4-pin mini XLR connector, the R-4TBM is a versatile solution for any wireless setup.

Model Features

• 108MHz UHF wideband with 2400–3000 selectable frequencies
• Rugged aluminum chassis with LCD display and Lock-On security
• Adjustable RF power output for venue-specific tuning
• REMOSET ID pairing for fast, wireless frequency sync
• Includes CM-501 cardioid lavalier microphone (50Hz–15kHz)

Model Specifications

• Carrier Frequency Range: 506–542 MHz
• Bandwidth: 108MHz
• RF Output: Low / High (adjustable)
• Frequency Stability: <±10kHz
• Frequency Deviation: ±48kHz (Peak)
• Spurious Emissions: <-50dBc
• Audio Frequency Response: 50Hz–18kHz
• Output Connector: 4-pin Mini XLR
• Battery: 2 x AA (UM3)
• Dimensions: 2.44 x 3.16 x 0.89 in (62 x 80.3 x 22.6 mm)
• Weight: 93g

Condition Guide. All Stage Gear products are professionally inspected and tested before shipment. 

- Clearance: Brand new, unused inventory that is discontinued or no longer stocked.
- B-Stock: Open-box, demonstration, or lightly used equipment. Fully tested, complete, and in excellent working condition. May show minor cosmetic wear.
- C-Stock: Professionally used equipment. Fully tested and operational with moderate cosmetic wear consistent with normal use.
- D-Stock: Functional B- or C-Stock equipment with cosmetic wear and/or missing accessories. Included components are listed on the product page and additional items may be required before use.

All used equipment is sold in the condition identified on this product page. All sales are final once shipped. No returns, exchanges, or refunds are permitted except as provided noted here. For any Clearance, B-Stock or C-Stock items, these are professionally tested and backed by a 90-day limited warranty against functional defects. Approved warranty claims require the item to be returned to Stage Gear for evaluation. At our discretion, the item will be repaired, replaced, or store credit will be issued. No cash refunds. For D-Stock, these are sold AS IS with no warranty, no returns, no exchanges, and no refunds. For the avoidance of doubt, any cosmetic wear, packaging condition, and other characteristics consistent with the item's condition grade are not considered defects.