Smart Bluetooth headset, the charging compartment supports wireless charging, using Bluetooth 5.0, binaural stereo call, single or binaural use, anti-sweat, anti-scanning, 10mm speaker D o-visual party, intelligent switching contactless; package: 2x headphones, 1xType-C charging cable, 1x charging compartment, 1x lanyard, 1x manual, 1x data box 'packaging Bluetooth version: Bluetooth 5.0 Speaker diameter: 10 mm Speaker impedance: 32 ohms Frequency response range: 20-20K Hz Bluetooth Distance: 10 meters Headphone battery capacity: 40 mA Rechargeable battery capacity: 350mA Charging interface: Type-C interface Working time: 3 hours (listen to music) Talk time: 5 hours Power Consumption: 13mA (A2DP) Waterproof grade: life waterproof Headphone size: 20x22x27mm Cargo box size: 67x53x36mm Packing parameters: Net weight of single earphone: 5.6g Net weight of single charging case: 40g Net weight of the whole machine: 51g Package Gross Weight: 140g Packing box size: 10x10x5cm