TWS K69 Bone Conduction Bluetooth Headphones Wireless Binaural Business Earphone Waterproof Sports Running Earbuds 1. Bone conduction can better protect our ears and reduce bacteria in the ears. 2. Sound quality transmission is clearer, with noise reduction effect. 3. Bluetooth 5.0 chip transmission is more stable, smooth, and without delay. 4. The ears are ergonomically designed and comfortable to wear. Specifications: Model: K69 Transmission range: 10 meters Bluetooth protocol: 5.0 Charging interface: Mirco Play time: 5 hours Charging time: about 1.5 hours Battery capacity: 180mAh How to use: earplug type Color: black, green, pink Single or dual ear: bilateral stereo Function: battery display, call function, support music Applicable gift-giving occasions: weddings, birthdays, holidays, housewarming, trade fairs, advertising promotions, employee benefits, anniversary celebrations, business gifts, opening ceremonies, awards commemorations, public relations planning. Package Included: 1*headphone 1*charging cable 1*Instruction