1. Audio channel: 2.1 channel
2. Bluetooth version: 5.0
3. Audio input: Bluetooth+AUX+U disk+USB sound card
4. Audio output: Passive speaker + 3.5mm interface stereo output
5. Volume adjustment: Encoder knob adjustment, smooth feel
6. Frequency range: 20Hz-30KHz
7. Signal to noise ratio: 92dB
8. Output power: 50W x 2
9. Adapted speaker: 10-200W /4/8 ohm
10. Output filter: LC filter
11. Protection mechanism: Static electricity, overvoltage, undervoltage, overheating, DC detection and short circuit protection
12. Adapter power supply: DC 5-26V/5A above
13. Function: Support Sinilink APP control
14. Size: about 9.5 x 7 x 2.5cm
15. Weight: about 130g

Packing list:
1. Upper cover
2. Bare board
3. Lower cover
4. Knob cap x4
5. M2x4+3 copper pillar x 4
6. M2x3 screw x 8
7. M2x18 copper pillar x 4
8. DC adapter x 1
9. Heat sink x 1
10. Thermally conductive silicone paste x 1