Specifications: - Bluetooth version：Bluetooth V3.0 - Color: Light Blue - Transmission Distance: 10m/33ft - Sensitivity: 80dB+ / - 3dB - Wireless carrier frequency：2.40~2.48GHz - Rechargeable lithium battery: 300mAh - Charging time: 2H - Music Time: 3H - Talking Time: 3H - Standby Time: 200H - Charge port: USB - Driver diameter:40mm - Earpad diameter: 70mm - For iPhone, All Android Smartphones, Pc, Laptop, Mp3/mp4,Tablet Ear phones Product dimension size: 165*25*165mm/6.5*1*6.5*in Item weight: 0.145kg Package includes: 1 * EXCELVAN Bluetooth headset 1 * USB cable 1 * User Manual Notes: 1: The 3.5MM audio cable is not included. 2: Please use the headphone after charging it full.