Model                    : E750 Smart Wireless Sporty Earplug
Batteries                : Built in Rechargeable, 3.7V/60mAh Lithium Battery
Compatible Devices       : IOS, Android, Windows
Battery Cell Composition : Lithium
Charging Voltage         : DC4.75-5.25V
Bluetooth Version        : V4.1
Bluetooth Profile        : HSP,HFP,A2DP,AVRCP
Transmission Power       : Class 2
Operation Range          : Up to 10 Meter
Frequency Range         : 2.402-2.480 GHz
Charging Time         : About 2 Hours
Music Playing Time      : Up to 3.5 Hours
Talk Rime         : Up to 4 Hours
Stanby Time          : Up to 150 Hours
Diamensions(mm)         : L38*W10.5*H6.5
Weight             : 10g
Package Included : 1 x BlueDigit E750 Smart Wireless Sporty Earplug