This is ZK-1002M 100WX2 Stereo Bluetooth 5.0 Power Audio Amplifier Board, it has overheating, overcurrent, and short circuit protection. The supported audio input is Bluetooth-Compatible 5.0, aux, USB flash disk, and computer USB. The supported audio output is the active speaker, and passive speaker (only one of the passive speaker and active speaker can be selected).

Features:

• Model: ZK-1002M 100W+100W | ZK-502M 50W+50W
• Type: Bluetooth-compatible power amplifier board
• Bluetooth-compatible version 5.0
• It has 2 Channels left and right channels (stereo).