Bluetooth Sports Knitted Hat with Mic - Red

Bluetooth Music Sports Winter Warm Knitted Hat with Mic - red Bluetooth V3.0 version, available for most devices with Bluetooth function Soft knit material, keep warm in winter Built-in mic, can answer your calls hands-free Best accessory for running exercise The hat can be washed Build-in 100mAh Li-ion chargeable battery, charge via USB cable Specification: Bluetooth version: V3.0 Working distance: up to 10 meters Frequency range: 2.402GHz-2.480GHz Li-ion battery: 3.7V / 100mA Charging time: about 2 hours Working time: about 3.5 hours Standby time: about 60 hours