1. Using the rotary encoder used in high-end speakers, stepless tuning, smooth hand feel, one-key start and stop 2. High-quality all-copper DC plug, long life 3. 3.5mm audio output, connected to active power box 4. Free large area heat sink 5. Number of channels: left and right dual channel (stereo) 6. Protection mechanism: power reverse connection protection, short circuit protection, self-recovery overheat protection 7. Purpose: Bluetooth speaker amplifier motherboard 8. Bluetooth version: 5.0 9. Adapter speaker: 20-300W 4 ohm 8 ohm 10. Transmission distance: 15 meters (without blocking) 11. Supply voltage: DC 5-26V 12. Dimensions: 53x18x58mm 13. Weight: about 70g
