"DESCRIPTION 50W Bluetooth HiFi Power Amplifier Mini Audio Digital Stereo FM Car AMP Remote Features: *220V 50W Car Accessory Bluetooth HiFi Bass Audio Amplifier USB TF MP3 FM *Can play music from TF card, U disk and Bluetooth *Remote control with numeric key which can control it directly *Comes with built in Bluetooth chip and radio function *With three types of modes: Bluetooth mode, radio mode and audio input mode *Can use U disk, card reader, TF card, connect computer, mobile phones and so on *Supports 12V / 24V / 220V *Suitable for all vehicles Specifications: Voltage: 220V *Maximum power: 50W *Impedance: 4 () *Speaker unit:133 (mm) *Frequency response range: 20-20000 How to use the Bluetooth ? Connect to the speaker and power adapter, you'll see this guide ""Bluetooth is ready to connect"", then turn on your phone's Bluetooth feature and connect to the BT-033 Package Contents: 1*Car Bluetooth Amplifier 1*Remote Control 1*220V Power Cable 1*DC Power Cable 1*Tweeter line Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. "