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| Materials: | 
PC + ABS + Stainless Steel | 
| Noise Isolation | 
Passive | 
| Driver Size | 
23 mm | 
| Impedance | 
32 ohms士15% | 
| Sound Pressure Level | 
120dB士3 | 
| Frequency Range | 
20Hz to 20KHz | 
| Max Distortion | 
≤5% | 
| Bluetooth Version | 
Bluetooth V5.0 | 
| Bluetooth Profile | 
AVRCP, A2DP, HSP, HFP | 
| Audio Technology | 
SBC | 
| Operation Range | 
10 meters, Class 2 | 
| Signal Antenna | 
PCB | 
| Microphone | 
ECM,Uni-directional ,-50db士3 | 
| Controls | 
Call, Track selection, Volume, Siri activation by button | 
| Lithium polymer type | 
180mAh lithium ion type | 
| Battery Life | 
17 hours | 
| Charging Interface | 
Micro USB | 
| Charging Time | 
2 hours |