Material:ABS,Plastic Weight[g]:231g Battery Capacity[mAh]:400mAh/1.148Wh(charging bin) Battery life up to[hours]:25~30 hours Maximum wireless range[m]:<10m NFC Technology:No Sound Isolating:YES Category:Earphones & Headphones Earcups Type:Sealed Max Output:0mW Number Of Drivers:4 Charging Method:Charging case Headphone Pads Material:Silicone Driver Diameter:10mm Total Harmonic Distortion:1% Impedance Range:from 33 to 100 Bluetooth Version:5.2 Package List:User Manual,Charging case,Charging Cable Features:waterproof,With Microphone,Apple Siri Support,Active Noice Cancelling,Dual Connection,Google Assistant Support Codecs:AAC,sbc With Microphone:Yes Is wireless:Yes Support APP:Yes Waterproof:Yes Resistance:20 Line Length:0m Frequency Response Range:20 - 20000Hz Sensitivity:42dB Plug Type:NONE Function:Common Headphone,For Mobile Phone,HiFi Headphone,Sport Active Noise-Cancellation:Yes Volume Control:No Control Button:No Vocalism Principle:Dynamic Wireless Type:bluetooth Connectors:Type c Communication:True Wireless Style:In-ear Material:ABS+PC Bluetooth version:V5.2 Communication distance:10m Music time:5 hours (70% of the volume) Music time with a charging bin:25~30 hours Battery capacity 1:40mAh/0.148Wh(earphones) Battery capacity 2:400mAh/1.148Wh(charging bin) Earphone rated input:DC5V= 80 mA charging bin rated input:DC5V= 600 mA Earphone rated consumption current:10mA charging bin rated current consumption:160mA Charging time:about 1 hour Product size:30*21*22.5mm Charging bin size:49*61.1*23.8mm