Specifications: 

· Bluetooth protocol:5.0 + EDR 

· Bluetooth profiles: A2DP, AVRCP, HFP, HSP 

· Working range:within 10 meters 

· Speaker diameter:40 mm 

· Power:4Ω.3W X2 

· Headphone sensitivity:95dB 

· Microphone sensitivity:90 dB 

· Signal to noise ratio:＞85 dB 

· Frequency response:40 Hz - 16000 Hz 

· Battery capacity:450mAh 

· Charging time:2 hours 

· Column working time:5 hours

· Earphone working time:12 hours 

· Input current:DC5V 500mA 

· Wired connection type:mini jack 3.5 mm 

· Supported media:micro-SD 

· Built-in microphone:yes 

· Radio mode:yes 

· Black colour 

Package contents：

· Headphones; 

· Charging cable Type-c / USB; 

· Audio cable AUX 3.5 mm; 

· Instruction;