Sound quality is very good and it can drive 4/6/8 ohm speakers. It has mono 30W power output. 

Features:
Sound quality is very good by using this module.
Mono digital audio power amplifier chip.
30W output and low power consumption.
Applicable speaker impedance: 4/6/8 ohm(8 ohm is the best).

Specifications:
Amplifier Chip: TPA3110
Working Voltage: DC 8-26V
Output Power: 1*30W
Applicable Speaker Impedance: 4/6/8 ohm(8 ohms Best)
PCB Board Size: 42 * 30mm / 1.65 * 1.18in
Weight: 10g / 0.35oz

Package List:
1 * Mono Digital Amplifier