Wireless Neckband HeadphonesFeatures:- Equipped with 8mm drive to deliver stunning sound for an enjoyable listening experience.- Built-in large capacity battery for up to 12 hours working time and 7 days standby time.- Works with Bluetooth 5.0 chips to ensure stable and fast connection.- IPX5 waterproof rate can keep the rain and sweat far away- Ergonomically designed earphones for long-time comfort.- CVC noise-canceling microphone- Magnetic design for easy storeSpecification:- Brand: Lenovo- Model: HE05- BT version: 5.0- Material: metal, silicone, TPE- Transmission distance: 10m (accessible)- Waterproof: IPX5- Dustproof: IP6X- Battery: 3.7V / 105mAh- Working time: about 8 hours- Standby time: about 120 hours- Charging time: about 2 hours- Color: black, red, white (optional)- Horn diameter: 10mm- Speaker sensitivity: 98dB- Frequency response range: 20-20kHz