805E Dual USB Charging Bluetooth FM Transmitter MP3 Music Player Car Kit, Support Hands-Free Call & Read TF Card U Disk Music(Black) Technical Parameters Rated working voltage: 12-24V Power consumption: 5W Working temperature: -10-70 degrees Working temperature: 0-90% Frequency response: 20Hz-15Khz Audio format: MP3WMA Signal to noise ratio: -68dB Bluetooth version: V5.1+EDR Bluetooth Sound Processing - A2DP (Advance Audio Distribution Profile) Bluetooth transmission distance: 10-15m FM transmission frequency: 87.5-108.0Mhz Dual USB fast charge output: 5V3.1A Product features 1. As soon as the auto starts, screen displays its battery voltage. 2. Play music from USB disk and TF Card. 3. Audiomusic playback car Bluetooth. 4. Voice prompts the caller number when a call comes in. Digital display calling number. 5. For other compatible music device or your MP3 MP4 player,connect to the Headset hole using the audio line, also tobe able to launch car audio through the FM transmitter, let you enjoy the music.