Description: Power Amplifier(US Standard): Using powerful power amplifier chip, the maximum output power can reach 50W+50W, which is enough for most computer oacute;w desktop/bookshelf. Voice Effects: Sound power amplifier, internal passive speakers (4-16Q). The sound is clear and clear without any audible noise even in high performance. Connecting devices: digital power amplifier can connect mobile phones, computers, notebooks, MP3, TVs and projectors with AV audio holes (lotus jack) or 3.5mm headphone output etc. Bluetooth connection: HiFi AMP radio speaker receiver, loudspeaker oacute;w Bluetooth devices on the market can be connected to achieve wireless transmission Features: speaker amplifier audio amplifier is a constant resistance power amplifier, supporting 4/6/8/16 ohm oacute;w passive audio/speaker. Specification: Function type: 2.0 stereo Output power: 50W + 50W Working voltage: DC9V-24V Bluetooth distance: at least 12 meter oacute;w (barrier-free) Bluetooth protocol: 5.0 Audio input: 3.5mm stereo input, stereo input RCA, TF card, U disk, USB audio input (can connect to computer/mobile phone/OTG/OTG tablet) Material: ABS Table size oacute;w: 10cm x 5cm/3.94in x1.97in Package Includes: 1x Power Amplifier (US standard) 1x Power Adapter 2x Audio Cable Note: Please allow slightly errors due to manual measurement of different monitors.