<strong>Specification:</strong><br> Bluetooth version: V5.0+EDR<br> Wireless frequency: 2.4GHZ<br> Supporting agreement: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3<br> Transmission distance: 15-20 meters<br> Battery capacity: 45mAh/350mAh<br> Charging voltage / current: 5V / 1A<br> Play / talk time: about 3 hours<br> Charging time: about 1 hour<br> Standby time: 60 hours<br> Speaker impedance: ?10MM 32?<br> Microphone sensitivity: -42Db<br> Working temperature: -10-50 °C<br> <strong><br> Feartures:</strong><br> Bluetooth 5.0, energy saving, improved data transmission, and low interference,built-in microphone, with excellent CVC8.0 noise reduction, makes data transmission more timely, stable, faster and farther, provides 3D stereo effect to improve your listening experience.<br> One Step Pairing,Just pick up the headsets from the charging box, they will connect each other automatically and and there's no need for re-pairing after initial pairing, even if the phone is out of sight, you won't miss an important call.<br> Wireless dual ear stereo design, left and right ear channel separation; you can use its Left and Right Ear Headset solely (Single Track Mode), and it also can be used in pairs (Stereo Mode).<br> The headphones will be charged automatically in the charging box and stop automatically after fully charged,3300mAh charging box can work as a power bank to charge your smart phone, MP3, etc.<br> Living waterproof,Perfect for Sports,Running,Jogging & Gym Exercise or more.<br> <br> <strong>Package Includes:</strong><br> 1* TWS Earphones<br> 1*Charge Case<br> 1*USB Charging Cable<br> 1*User Manual