1. Professional DSP chip, intelligent optimize sound, effective noise reduction 2. 9.7mm cardioid directional, highly sensitive pickup 3. Compatible with a variety of mainstream music platforms and K song software 4. 4 hours long battery life (70% volume) 5. Bluetooth version: BT5.0 6. Battery: 3.7V 1500mAh 7. Rated input: 5V 1A 8. Charging port: Type-C