Features: Full-band operation, frequency range from 70MHz to 108MHz, adjustable. Excellent heat dissipation, stable and reliable power performance. Easy to use with all functions accessible via the interface. Compact and lightweight design ensures maximum portability, ideal for travel. High signal strength and clear sound quality, suitable for home, car, classrooms, auditoriums, dormitories, and outdoor spaces. This mini FM transmitter converts audio signals from devices such as PC, TV, and other audio players into high-fidelity wireless FM stereo signals. Use any FM radio as a receiver to enjoy stereo music without cable clutter. Specifications: Transmitting Frequency: 70MHz108MHz (adjustable) Default Boot Frequency: 87MHz Stereo Resolution: 40dB Signal to Noise Ratio: 65dB Transmitting Power: 10mW Working Current: 75mA Operating Voltage: 2.2V3.3V Standby Current: 1A Operating Temperature: 0C70C Transmission Distance: Approximately 50 meters / 164 feet Power Source: 2 x AAA batteries (not included) Instructions: 1. Connect the audio cable and install two AAA batteries. Press and hold the power switch for 3 seconds to turn on. The display will show the default frequency of 87MHz. 2. Use the "Frequency +" and "Frequency -" buttons to select a desired frequency. The frequency will flash on the screen. Press the "OK" button within 20 seconds to confirm. Once confirmed, the frequency stops flashing and becomes the active transmission frequency. 3. To lock the frequency, press and hold the "Frequency Lock" button for 3 seconds. When "LOC" appears on the display, the frequency is locked and cannot be changed. To unlock, press and hold the "Frequency Lock" button again for 3 seconds. Color: White + Light Wood Color Material: ABS Package Contents: 1 x FM Transmitter 1 x Audio Cable 1 x English Manual Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight variations between the product color in images and the actual product. Measurement error is permitted within 13 cm.