AK-370 Home Theater Amplifier 20 Channel Audio Amplifier 20W+20W Digital Audio Amplifiers DC 12V Mini HIFI Stereo USB OTG Input AK-370 Bluetooth-compatible Digital Amplifier for Home Theater 2.0 Channel Auto Music Subwoofer Speaker 20W+20W 12V HIFI Stereo USB OTG Input Feature: 1. Connect multiple devices: The power amplifier can be connected to mobile phones, computers, tablets, laptops, MP3s, televisions and projectors with A audio (lotus socket) or 3.5m headphone output holes. All kinds of mobile phones on the market can be connected via Bluetooth-compatible to realize wireless playback. 2. Bluetooth-compatible power amplifier: Mini HIFI digital Bluetooth-compatible audio power amplifier. 3. Support wireless connection: TF card, AUX, U disk, MP3 format playback, support Bluetooth-compatible wireless connection. Support FM stereo radio. 4. Easy to use: Low distortion provides clearer, stronger, and more powerful sound.With treble, bass and volume control, it is very easy to use. 5. With remote control function: DC/AC power input, suitable for home or car.Low heat and light weight. Specification: Certification: NONE Origin: Mainland China Model Number: Bluetooth-compatible Amplifier Channels: 2 (2.0) Product name: Bluetooth-compatible power amplifier Color: black Function type: 2.0 stereo Output power: 20W+20W Power requirement: 12V (not included) Impedance: 4-16 ohms Bluetooth-compatible distance: about 10m (barrier free) Bluetooth-compatible protocol: 5.0 Signal to noise ratio:>90dB Frequency: 20Hz-20KHz Distortion rate: 0.01% Audio input: RCA stereo audio, Secure Digital card, U disk, USB audio input can be connected to computer/mobile phone/OTG/tablet 0TG Product size: 125 (L) * 75 (W) * 40 (H) mm/4.9*2.95*1.6in Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1 x Bluetooth-compatible Power Amplifier 1 x Instructions 1 x Remote Control