ANKER soundcore TWS Bluetooth 5.0 Binaural Wireless Bluetooth Earphone with Charging Box 1. IPX5 is waterproof and easy to deal with sweat and rain. 2. Bluetooth 5.0 transmission standard, 12 meters effective transmission distance, providing you with a strong and stable audio connection experience. 3. Both the left and right ears have a touch interface, and double-click and long-press to complete all functions. With just two taps, you can also activate the phones built-in voice assistant to make operation easier. 4. Dual-microphone uplink noise reduction technology optimizes sound while reducing background noise, weakening echo, and enabling binaural stereo calls. 5. Graphene diaphragm, high-fidelity sound quality, giving you an immersive listening experience. 6. Charge once and use for 5 hours. With the portable charging box, it provides 15 hours of power for the headset and more than 20 hours of use. 7. Remove the headset from the charging box, the headset automatically turns on and complete the left and right ear pairing, and quickly connect to the device. Put the headset into the charging box and the headset will automatically shut down and charge. Parameters: 1. Audio: Drive unit: 6mm x 2, frequency response range: 20Hz-20KHz. 2. Wireless transmission distance: 12 meters. 3. Battery display: Support. 4. Weight: 5.5g for a single headset, 60g for a charging box (not including headphones). 5. Charge box capacity: 500mAh. 6. Impedance: 16 ohms.