1. Apply to car and other FM signal receiving system 2. Can increase the receiving distance and improve the reception of weak signals. 3. Suitable for 12-24V voltage. Made of ABS, and can be used for a long time. Voltage: 12~24V Frequency: 88~108MHz Gain: 25~30dB Due to different product batches, the appearance may be different, which does not affect the use. Color: as shown Material: plastic+metal Package Contents: 1 x Radio Antenna Amplifier 1 x Clip 2 x Magnetic Rings 1 x Double-sided Adhesive Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.