Feature: 1. Hands-free function \u0026 Wireless music. 2. Supports all car speakers with AUX input. 3. Multi-function, can connect with two BT devices. 4. Compatible with most smartphones and BT electronics. 5. Reverse control of the music play of connected BT devices. 6. Easy to set up, just plug the receiver into car charger and connect to the BT device. Specification: Enjoy the convenience of a wireless connection while listening to your favorite tunes. Allow to simultaneously connect 2 BT devices and switch to play music between both devices. Features: Hands-free function & Wireless music. Supports all car speakers with AUX input. Multi-function, can connect with two BT devices. Compatible with most smartphones and BT electronics. Reverse control of the music play of connected BT devices. High quality stereo transmission for a better music experience. Up to 90dB SNR and low audio distortion of 0.05%. Easy to set up, just plug the receiver into car charger and connect to the BT device. Small size and lightweight, convenient to use and store. Specifications: BT Version: V4.0+EDR Frequency Range: 2.4GHz Output Power Category: Class2 BT Mode: HFP/HSP/A2DP/AVRCP BT Range: up to 30 feet Input: 12~24V Output: 5V/2.1A SNR: >92dB THD:<0.05% Frequency Response: 20Hz~20KHz Cable length: 1m Item size: 110 * 25 * 15mm / 4.33 * 0.98 * 0.59in Package size: 156 * 100 * 30cm / 6.14 * 3.94 * 1.18in Item weight: 50g / 1.76oz Package weight: 60g / 2.11oz Pair to your phone: Plug the receiver to the car charger Turn on the BT funcation of your phone Search for the BT devices and select "LinK-BT4823" Enter the code "0000" if needed If pairing is successful,the blue light will be bright constantly Connect two BT devices at the same time: Pair the BT receiver to the first phone Turn on the BT function of the second phone Search for the BT devices and select "LinK-BT4823" and click "connect" Remark: Auto connect funcation,the receiver will connect to the last connected phone automatically when it turns on. Package List: 1 * BT Car Kit(Not include the Car Charger) 1 * User Manual Package List: 1 * BT Car Kit(Not include the Car Charger) 1 * User Manual