Check the listing for details. CZE-T200 Portable Stereo Wireless FM Transmitter 0.2w with Microphone Adjustable. Condition: New. Listed at 74.25 USD. Description： 1，Features at portable size, high quality, long broadcasting range and stable performance. 2，It is especially suitable for application area such as tourism, meeting room, campus, driving school, teaching stadium, etc. 3，This transmitter uses 1000ma Li-on battery, its high capacity enables a long working time up to 16hours at the lowest power output mode. 4，Designed with bot Stereo and Mono audio output, both line-in and microphone volume is adjustable by pressing the botton on the case. 5，The Power output is 4 levels adjustable; choose different power in different situation can avoid interference to the environment around. Technical Specification: 1. Power supply: BL-5C Li-on battery, 3.7V 1000mAh 2. Frequency range: 87~108MHz / 76~90MHz (optional) 3. Frequency Stability: ±10PPM 4. Frequency stepping: 100KHz 5. RF power output (Level 1/2 /3/4) 0.01mW-10mW-100mW-200mW 6. Broadcasting range for reference (Level 1/2 /3/4) 10m-100m-300m-500m 7. Working time (Level 1/2 /3/4) 16h-10h-8h-6h 8. Battery Charging time: About 5hours, voltage is 5V. 9. Spurious, harmonic radiation: