1. Scope of Application: All car audio with AUX IN audio input function. 2. Compatibility: Bluetooth-compatible version. Bluetooth-compatible 3.0 standard (supports A2DP; AVRCP). Lossless transmission, standard 3.5mm audio output. Frequency Response: 20Hz-20KHz. 3. Button Backlight Design: Easy to operate. Easy and simple to upgrade your car stereo Bluetooth-compatible hands-free wireless audio 4. Handsfree: Support Bluetooth-compatible hands-free function, you can listen to music while the any phone Support for voice . 5. Common Function Control: Support common function control functions. You can in the car within the scope of smart devices cozy browse your music on the list to select their own favorite music play / pause; previous song; music selection. Name:Car Bluetooth-compatible Audio Receiver MP3 Bt version:V3.0+ Frequency range:2.4GHz Output power class:Class2 Bt Mode:HFP//A2DP/AVRCP Bt range:up to 30 feet Input voltage:12-24V Working voltage:DC5V Working current:DC 5V/8-15mA Output current:2.1A Power source: lighter Scope of application: mobile phones/tablets/and various USB charging digital products. Note:Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color:Black Material:plastic Package Contents: 1 * Audio Receiver 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.