1. Widely used 2. Simple installation 3. Protection mechanism: electrostatic protection, overcurrent protection, short circuit protection, overheating protection 4. Support Sinilink-APP, modify the Bluetooth name, set the Bluetooth password, turn off/on the prompt tone 5. Achieve 360-degree stepless tuning and feel smooth, one-button start-stop, long- switch machine operation is simple and convenient Product model: XY-E30H Name: 2.1 channel Bluetooth audio power amplifier board module Power 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 ratio: 92dB Output power: 15W x 2 (left and right channels) + 30W (subwoofer) Satellite box (left and right channel) adapted speakers: 5W--30W/4 ohm--16 ohmSubwoofer (subwoofer) adapted speakers: 5W--50W/4 ohm--8 ohm Weight: 200g Dimensions: 70 x 73 x 20mm Colour: as shown Material: ABS Package Contents: 2 x Audio Power Amplifier Board 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.