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