Support Sinilink-APP, modify the Bluetooth name, set the Bluetooth password, turn off/on the prompt tone Achieve 360-degree stepless tuning and feel smooth, one-button -stop, long-press switch machine operation is simple and convenient Protection mechanism: electrostatic protection, overcurrent protection, short circuit protection, overheating protection Product : XY-E100L Name: 2.1 channel Bluetooth audio amplifier board module supply: DC9-24V/3A above Bluetooth version: 5.1 Audio channel: 2.1 channel Audio input: Bluetooth + AUX Audio output: left and right channels + subwoofer Volume adjustment: high-end encoder knob adjustment feel smooth Frequency range: 20HZ--30KHZ Signal to noise : 92dB Output : 50W x 2 (left and right channels) + 100W (subwoofer) Satellite box (left and right channel) adapted speakers: 10W--50W/4 ohm--8 ohm Subwoofer adapted speakers: 20W--100W/4 ohm--8 ohm colour: black Material: plastic Size: about 70x73x20mm Note: The product needs to assemble the shell by itself, the assembly is very simple The impedance of the adapted speaker is 4 ohms, and the supply cannot exceed 12V The impedance of the adapted speaker is 8 ohms, and the supply cannot exceed 24V Package Contents: 1 x amplifier board module Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.