Description: 【Power Amplifier(US standard)】: Using a powerful power amplifier chip, the maximum output power can reach 50W+50W, which is enough for most household desktops/bookshelves. 【Sound Effects】: Audio Power Amplifier, indoor passive speakers (4-16Q). The sound is clear and clean without any audible noise even at high output. 【Connecting Devices】: Digital Power Amplifier can connect mobile phones, computers, , notebooks, MP3, TVs and projectors with AV audio (lotus socket) or 3.5mm headphone output holes, etc. 【Bluetooth Connection】: HiFi Stereo AMP Speaker receiver, mainstream Bluetooth devices on the market can be connected to achieve wireless transmission 【Features】: Sound Amplifier Speaker Amplifier is a fixed resistance power amplifier, supporting 4/6/8/16 ohm passive audio/speaker. Specification: Function type: 2.0 stereo Output power: 50W+50W Working voltage: DC9V-24V Bluetooth distance: at least 12 meters (without barriers) Bluetooth protocol: 5.0 Audio input: 3.5mm stereo input, RCA stereo input, TF card, U disk, USB audio input (can be connected to computer/mobile phone/OTG/tablet OTG) Material: ABS Size Chart: 10cmx5cm/3.94inchx1.97inch Package Includes: 1x Power Amplifier(US standard) 1x power adapter 2x audio cable Note: Please allow slightly errors due to manual measurement and different monitors.