1. Support for the Siri Voice . Bluetooth 5.0 standard (a2dp, AVRCP) 2. Audio transmission: lossless transmission, standard 3.5mm audio output. Compatible with most smartphones and tablet PCs with Bluetooth function 3. Application range: all car audio with AUX IN audio input function 4. Support Bluetooth hands-free function. Support common functions, such as play / pause, previous song, next song, and so on 5. Backlight design button, easy to operate. Up to 92dB and low audio distortion of 0.05%, fully meet your demand for audio. Support USB 5 V / 2.1a, fast charging Input: 12 - 24 V Output: 5 V / 2.1A : 92dB : less than 0.05% Frequency response: 20Hz - 20KHz Bluetooth Transmission Distance: less than 10M Item Type:Bluetooth Car Kit Special Features:USB Charger colour:Black Material:ABS size:9.9 x14.8 x 3cm Package Contents: 1 x Host 1 x 3.5mm extension cable Only the above package content, other products are not included. Note: Light 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.