Description: 【Power Amplifier】: Audio Power Amplifier is a 2.0CH speaker mini power amplifier. With LCD screen, backlight design. Support FM radio function. 【Scope of Application】: AK-370 Bluetooth Amplifier can be connected to mobile phones, computers, , notebooks, MP3, TVs and projectors with AV audio (lotus socket) or 3.5mm headphone output holes, etc. All kinds of mobile phones on the market can be connected with Bluetooth to realize wireless playback. 【With Remote Control】: HiFi Stereo AMP Speaker has a remote control, which supports full featured remote control. Can read U disk and memory card, plug and play, support BT wireless connection. 【Size】: Sound Amplifier Speaker Amplifier, size 12.5cmx7.5cmx4cm/4.92inchx2.95inchx1.57inch, compact and portable. Made of aluminum alloy material, it is durable. 【Audio Input】: RCA stereo audio, TF card, U disk, USB audio input (can be connected to computer, mobile phone, OTG, tablet OTG). Specification: Function type: 2.0 stereo Rated voltage: 12-14V Rated power: 20W+20W Rated frequency: 20-20KHZ Resolution: 47K Distortion rate: 0.1 Signal to noise ratio: 90db Impedance: 4-16Ω Amplifier type: HIFI amplifier Bluetooth distance: about 10 meters (without barriers) Bluetooth protocol: 5.0 Material: aluminum alloy Size Chart: 12.5cmx7.5cmx4cm/4.92inchx2.95inchx1.57inch Package Includes: 1x Power Amplifier 1x remote control Note: Please allow slightly errors due to manual measurement and different monitors.