Model: car amplifier board high power 70W Channel: mono Voltage: 12V124V/110-220V Power: 50W-70W Frequency: 30HZ-13KHZ Description of features: can be inserted TF card / U disk / USB, can be connected to the AV audio input Other features: built-in Bluetooth + FM radio Bluetooth function: the default mode is the mode, direct cell phone search pairing can play music. fm mode: long press pause button to switch, the second mode is the radio mode. (Tip: the first time you use the radio, please press the pause button to search for channels, about 3-5 minutes after the search can be completed. usb/tf socket: power on and insert the card reader or memory card, the system automatically read and play. External tweeter can be connected, with power failure memory and auto-play function, support infrared remote control reception, support plug-in remote control song selection, delivered with an audio cable, you can input the audio source through the computer, tablet, cell phone, TV and so on.