Features: Bluetooth: V4.0 2 devices can be matched High quality materials, lightweight body allows you to wear more comfortable It has built-in high-quality battery Compatible with various brands of Bluetooth phones and Bluetooth notebooks, tablet PCs, MID, etc. Specifications: Model: V8 Color: Black Wearing type: In-ear with earhook Feature: Wireless Headphone Function: Answering phone, Bluetooth, Microphone,DSP Intelligent noise reduction Connectivity: Wireless Connecting interface: Micro USB Application: Mobile Phone, Sport Power supply: Built-in rechargeable battery Support Agreement:A2DP/AVRCP/HEP/HSP/SSP2 Bluetooth: Yes Work time:5-6hours(a full charging) Standby time:about 7 days Bluetooth version:Bluetooth V4.0 Product weight:18g Package Included: 1 x bluetooth headset 1x usb charging cable 1 x user manual