TRUE WIRELESS HEADSET    
 
Model: NOAROE TWS S1  
Wireless version: 5.3  
Supported protocols: A2DP, AVRCP, HSP, HFP  
Wireless effective distance: 13 m  
Earphone battery capacity: 3.7 V 30mAh  
Music playback time: about 4 h (Normal mode $80 % volume)  
Talk time: about 3.5 h ( 80 % volume)  
Frequency response: 20-20000 Hz  
Earphone standby time: about 40h  
Driver unit: diameter 13 mm  
Charging case battery capacity: 3.7V 250mAh  
Charging input voltage: 4.8-5.5 V  
Charging duration: approximately 1 hour