Micro sized transmitter, in an impact resistant, hard composite case. With an internal lithium ion rechargeable battery and Lemo connector for a removable lavalier.Belt pack style8hr run time @50mWRF output range 10 – 250mW QT-5100 BeltMic – Comfortable and ConcealableThe QT-5100 BeltMic has a tough, composite, hard case with belt clip.  This transmitter is the RCAS enabled version of our worlds smallest belt mic, the QT-300 BeltMic. Weighing less than 2 ounces and only a 1/2 inch thick, the QT-5100 BeltMic joins the QT-5100 series as the most comfortable audio transmitters in the industry.The QT-5100 BeltMic utilizes the RCAS™ (Remote Control Audio System) a revolutionary way to remotely control transmitter settings from a central computer or hand held remote control.3000 ChannelsThe QT-5100 BeltMic offers approximately 3,000 channels. It is tunable from 525 to 600 MHz in 25 kHz steps.Technical Data• Dimensions: 53mm x 42mm x 19mm• RF output power: 10 to 250mW (user selectable, country restrictions apply)• Number of channels: approx. 3,000• RF frequency range: 525 to 600 MHz• Switching bandwidth: 75MHz (25 kHz steps)• Modulation: FM• Nominal deviation: +/- 40 kHz• Peak deviation: +/- 54 kHz• Pre-emphasis: 50 us• Compander: Q5X DCS-QT• Signal to Noise: 110dB (A) RMS• Frequency stability: +/- 0.001%• Spurious Emission: