Lenovo HE05 Neckband Bluetooth Headset. Bluetooth 5.0 chip, 10m barrier-free connection, Neck hanging: skin-friendly silicone appearance, universal folding and deformation of metal lining; Metal sound cavity, 10mm professional tuner tuning horn; Super long service time: 6 hours play time, 120 hours standby time; Full functions: IOS battery display/volume adjustment; Cut the song/pause/play; Answer/hang up the call Fashion color: glamour red/sky grey/apple white Brand Name: Lenovo Model: HE05 BT Version: 5.0 Material: Metal, Silicone, TPE Transmission Distance: 10m (no obstacle) Waterproof: IPX5 Dustproof: IP6X Battery: 3.7V / 80mAh Working Time: about 8 hours Standby Time: about 120 hours Charging Time: about 2 hours