DC: 8~24V Bluetooth version 5.0 Transmission distance 15Mi (visible unobstructed) Quantity Dual -channel (stereo) Output power (@1kHz) 16W*2 @12V 4Ω 10W*2 @12V 8Ω 15W*2 @16V 8Ω 20W*2 @20V 8Ω 30W*2 @24V 8Ω(Need to add heat sinks) Adaptation speaker (30w ~ 150W) 4Ohm (8 ~ 12V power supply) 8Ohm (8 ~ 24V power supply) 16Ohm (8 ~ 24V power supply) Module protection mechanism Power anti -connection protection Short circuit protection Self -restoration of overheating protection Note: In order to improve the performance of the module, it is recommended to work more than20W*2In the application scenarios, the amplifier chip plus heat sink 1. Use the amplifier board to stay away from the wifi signal (router) as possible (router) 2. Recommended power supply voltage 8 ~ 24V, exceeding 26V, the chip will be burned. 3, connect 4ΩThe power supply does not exceed 12V during the speaker, and the power supply does not exceed 24V when connected the 8 ohm horn 4. Power supply current is recommended to be more than 2A. 5. The module operates more than 20w*2, you need to add heat sink 6. Don't be too long, ensure that it is appropriate within 1 meter 7. Pay attention to static electricity protection. Before contacting, you need to release the static electricity on your hand to avoid static electricity to break through the chip. The Bluetooth chip is more sensitive to static electricity. 8. It is recommended to adapt the rated power of the speaker 30W or more to avoid the heating and burning of the speaker