ZK?502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual Channels Digital Audio Amplifier Module for DIY Speakers 5-24V

Specification: Item Type: Power Amplifier Board Material: PCB Purpose: Digital Power Amplifier Board Model: ZK-502L Bluetooth Version: 5.0 Input Method: Bluetooth Number Of Channels: Left and Right Dual Channels (stereo) Bluetooth Version: 5.0 (Unobstructed, Approx. 15m/49.2ft) Signal To Noise Ratio: >90 dB Adapted Power Supply Voltage: 5-24V (optional 9V/12V/15V18V/24V and Other Adapters, High Power Recommended High Voltage) Adapted Speakers: 30W-200 W, 4?-8? Power supply voltage:  12V-8 ?/12W+12W, 4 ?/20W+20W 15V-8 ?/18W+18W, 4 ?/30W+30W 19V-8 ?/32W+32W, 4 ?/45W+45W 24V-8 ?/38W+38W, 4 ?/50W+50W Protection Mechanism: Self Recovery Overheating Protection, Self Recovery Short Circuit Protection Package List: 1 x Power Amplifier Board  1 x Screwdriver 9 x Screw 4 x Brass Connecting Rod 2 x Acrylic Board 1 x Knob 1 x Cable Note: The input voltage cannot exceed 24V, otherwise the audio amplifier module will be damaged.