Equipped with TI TPA3116x2 Class D digital amplifier chips, the maximum power can reach 100+100W.Built-in DSP chip, supports high and low sound effect adjustment. Supports three signal inputs: active, coaxial, and optical fiber, and the front panel button switches with one button.Supports 6.5mm microphone insertion for singing. Front circular RGB multi-color fantasy lights, cool status.Equipped with infrared remote control, supports various function operations. Standard outer diameter 5.0mm/inner diameter 2.5mm power interface, supports DC 12V-24V power input. Bluetooth version: Bluetooth V5.3 Product model: M19 BT Transmission distance: barrier-free about 10-20 meters signal Input interface: RCA/Coaxial/Optical/6.5MM MIC Output interface: AUX/binding post Input parameters: DC 12-24V Supported protocols: A2DP/AVRCP/HFP/SBC Basic functions: Bluetooth reception, Bluetooth transmission, U disk playback (maximum support 128G), RGB fantasy color display, microphone singing Applicable equipment: various speakers, desktops, notebooks, TVs, amplifiers, projectors, etc. Colour:Black Material:Aluminum alloy Package Contents: 1x Player 1x Power Adapter 1x Audio Cable 1x Lotus Line 1x Remote Control 1x Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.