Flexible and easy to use. Perfect match with the car. New and nice quality, durable for long-term use. Built to strict quality control standards. Not easy to damage, ensuring a long service life. Stable performance, high reliability. A perfect replacement for your old antenna. Made of high-quality material for durable use. Item Type: Active Radio Antenna with Bluetooth Modulator Antenna Gain: 15DBI Working Voltage: 12V Standing Wave Ratio: Less than 2.5 Antenna Connector: Lantern connector (FM) Antenna Cable Length: 5M Applicable Type: Universal car roof antenna Installation Instructions: 1. Place the antenna modulator behind the car stereo, in a suitable location behind the DVD or radio. 2. Connect the FM male end of this antenna to the sound input of the original car CD or DVD. 3. After powering on the phone, turn on Bluetooth and connect to the device name: KROWN-6965. 4. After power on, the red power light stays on, the blue signal light flashes, and after successful Bluetooth connection, the blue light remains on. 5. Converts mobile phone Bluetooth music into RF signals. Features five LEDs representing different frequency points. The default frequency group stays on, while the backup group flashes when a new frequency is selected. Includes power-off memory function to retain the last used frequency setting. Condition: Color: Black Material: ABS Package Contents: 1 x Active Radio Antenna with Bluetooth Modulator Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.