• Bluetooth V3.0 version, available for most devices with Bluetooth function

• Soft knit material, keep warm in winter

• Set-in MIC, can answer your calls handsfree

• Can connected with 2 devices at the same time

• Best accessory for running exercise

• Build-in 300mAh Li-ion chargeable battery, charge via USB cable

Specification:

• Bluetooth version: V3.0

• Working distance: up to 10 meters

• Frequency range: 2.40GHz-2.48GHz

• Signal to noise ratio: 98Db

• Charging time: about 4 hours

• Working time: about 15 hours