Product parameters:
1. Pro-M Bluetooth version: 5.0
2. Pro-M battery capacity: 1500 mAh; Pro-G does not contain lithium batteries
3. Pro-M standby: 30 days
4. Speaker: 50 mm
5. Impedance: 32 ohms
6. Sensitivity: 110dB+3dB
7. Frequency response: 20Hz-20KHz
8. Plug type: 3.5mm/6.35mm stereo
9. Charging: Micro-USB charging cable
10. Cable length: 2 meters cable with volume control, mute button and microphone
11. Plug type: double 3.5mm "Y" shaped extension cable
12. Single weight: 420 grams
13. Single size: 17x14x10.5 cm
14. Can be connected to a variety of devices, strong compatibility

Pro-M packing list:
1. Headphones
2. Storage bag
3. USB charging cable
4. One-to-two audio cable
5. User Manual
6. 2m 3.5mm audio cable

Pro-G packing list:
1. Headphones
2. Storage bag
3. USB charging cable
4. One-to-two audio cable
5. User Manual
6. 2m 3.5mm audio cable
7. 3m 6.5mm to 3.5mm audio cable