Usage Tips:1. Reduce FM88-108MHz to 76-90MHz(All Channel Antenna), special design for the lower frequency of 76-90MHz car audio. 2. After adding this frequency antenna, through changing the frequency, the car audio can receive a much perfect frequency. 3. Reliable quality and safety, each unit is individually precisely tuned for desired band on appropriate RF test equipment. 4. With a red line for positive pole, black line for negative pole, convenient to install. 5. Suitable for most Japanese car radio, such as for Sony, Clarion, Kenwood, Alpine, Panasonic, ect. Frequency Range: Reduce FM88-108MHz to 76-90MHz(All Channel Antenna) Hole Diameter: 1.2cm/0.47inch Size(W x H): 2.5 x 1.9cm/0.98inch x 0.75inch Whole Length: 30.5cm/12inch colour: black Material: ABS Package Contents: 1 x Car FM Band Expander 1 x Instruction Manual Only the above package content, other products are not included. Note: Light shooting 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.