805E Dual USB Charging Bluetooth FM Transmitter 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: MP3/WMA 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: 5V/3.1A Product features 1. As soon as the auto starts, screen displays its battery voltage. 2. Play music from USB disk and TF Card. 3. Audio/music 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.