With FM radio function, support TF card and U-disk audio read function With AUC and Bluetooth function RCA audio output can be connected to a subwoofer Designed with colorful lights, cool and beautiful TYPE-C charging power interface (2.1A) Voice assistant function (in BT mode, short press button 2 to activate the voice assistant function of the phone) Mobile APP function, positioning and finding the car function (connect to the car through the mobile APP, and you can find the location where the car stopped when it turned off and left on the mobile phone) Audio source copy function (when a U disk or TF card is inserted, press and hold the knob in radio, BT music, or AUX mode to store the current favorite audio or radio station in the TF card or U disk for collection, so that it can be played and listened to next time) With mobile phone holder function (can be used as a mobile phone holder) Protection function for reverse connection of positive and negative poles of the power supply (wrong connection of the positive and negative poles of the power cord will not cause burning of the circuit board) Specification: Model: SWM D3400 CPU: Ab5301F FM frequency: FM 87.5~108MHz Radio IC: integrated chip Power amplifier IC: TDA1028 Output power: 45Wx4 Working voltage: 12~14.4V Working temperature: -10~60℃ Bluetooth version: version 5.0 (default name: SWL-BT) Screen size: LED display (white light) Installation size: 178x50mm Case size: 174x69mm Host depth: 55mm APP connection: support Locate and find a car: Supported Front USB: USB2.0 reading all the way TYPE-C interface: support TF card: support Reset button: support RCA port parameters: Audio output: 2 channels (left channel + right channel) AUX port parameters: Audio input: Front AUX input (left channel + right channel) Audio format: MP3/WMA/WAV/FLAC/APE Language: English Remote control batteries: 2 x AAA batteries (not included)