1. Adopting digital amplifier chip AXS2031, with simple circuit, high output power and other advantages. 2. Frequency range 87.5MHz-108MHz, with high sensitivity, low noise, strong anti-interference and other advantages. 3. Voltage range 2.5-5.5V, 5W high fidelity output at full load, voltage as low as 2.5V can still maintain no distortion. 4. With power failure memory function, using cool blue LED digital tube display, real-time display of the volume level or frequency received 5. 30cm universal signal receiving antenna, can be rotated in any direction to accept FM signals, can achieve the best reception effect<br><br>Power supply voltage: 2.5-5.5V Power supply: USB-5V or 2xAA batteries (not included in shipment) Receiving band: FM frequency band Frequency range: 87.5MHz-108MHz Output power: mono 5W Note: Only one of the two power supply methods can be selected when using! there are slight differences in appearance between different factory batches, it will not affect the use It's DIY kits, needs to finish by yourself Colour:Photo Color Material:plastic<br><br>Package Contents: 1 x DIY FM radio kit<br><br>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.