1.The product is made of materials with guaranteed quality 2.The product frequency is adjustable, with a total of 320 transmission frequencies and memory function 3.A regular radio that can receive FM broadcasts can effectively receive the signals emitted by this transmitter 4.LCD display, displaying the current transmission frequency 5.Stable product performance and long service life FM transmitter model: RC-FM Output frequency: Adjustable frequency, with a working range of 76MHz-108MHz, 1MHz or 0.1MHz in steps, 320 transmission frequencies in total, with memory function Output power: 10-500mW (0.01-0.05W) @ 88-108MHz Receiving equipment: ordinary radio. A radio that can receive FM broadcasting can well receive the signals transmitted by this transmitter. Display mode: LCD display, the display content is the current transmission frequency, and the production data of FM transmission antenna is attached. The actual measurement shows that the maximum distance of the transmitter in the open area is 2000 meters. Power supply voltage: 5V USB - type-c Power supply current: 500mA Input signal: audio stereo, 3.5mm interface standard, appropriate input volume, Signal to noise ratio: 63dB 0.05% Colour:Black Material:plastic+metal Package Contents: 1 x FM Transmitter 1 x telescopic antenna Only the above package content, other products are not included. Note: Light reflection 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.