Features: Full-band work, the frequency from 70MHz ~ 108MHz range can be arbitrarily set. Excellent heat dissipation, stable and reliable power. Easy to use and operate. You can operate all functions on the interface. The FM Transmitter is unique with its small size, allowing Maximum portability-perfect for traveling. High signal intensity and good sound quality, suitable for home, car, classrooms, auditoriums, dormitories, squares, etc. Description: This mini FM transmitter can convert audio signal of , PC, TV and other audio players into high-fidelity wireless FM stereo signal. Using FM radio as a receiver, This FM transmitter can transmit music to your FM radio, and enjoy stereo music without line trouble. Specification: Transmitting Frequency: 70MHz-108MHz (adjustable) Boot Frequency is: 87MHz (Default) Stereo Resolution: equal 40db Signal to Noise Ratio: equal 65db Transmitting Power: equal 10mw Working Current: less than equal 75mA Operating Voltage: 2.2V-3.3V Standby Current: less than equal 1uA Operating Temperature: 0-70 Transmitting Distance: 50 meters or so / 164ft Battery: 2 * AAA battery (not included) Instructions: 1. Connect the audio signal line, install the battery ( two AAA batteries), long press the "power switch" to boot for 3 seconds. Then the display shows the 87MHz transmit frequency. 2. Select an appropriate frequency by the "Frequency +" and "Frequency -" keys, the frequency word flashing. Then press the "OK" button within 20 seconds, the frequency word is no longer flashing, at this moment, the frequency on the screen is Actual transmission frequency. 3. "Frequency Lock" key is used to lock the frequency: long press the "Frequency Lock" key for 3 seconds. When displaying "LOC" words, it means lock frequency work successful, the "Frequency +" & "Frequency -" key not working. Then long press the "Frequency Lock" key for 3 seconds to cancel the lock function. Color: white + light wood color Material: ABS Package Contents: 1 * FM transmitter 1 * Audio Cable 1 * English manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.