1.The wireless earbuds support Bluetooth 5.3 technology, which is stable connection. After successful first pairing, just open the lid of the charging case to auto-reconnect to your Bluetooth-enabled devices of smartphones, tablets, computers, laptops, etc. 2.The wireless headphones last for 5-7 hours on a single charge or 60-70 hours with the compact case. 3.Each earphone can be independently connected to share happiness with others, with both sides being the main earphones, regardless of the main or auxiliary, connected independently. 4.Wireless earbuds is small and compact; It is smaller and more convenient. Music control, telephone answering/disconnecting, simple touch operation. 5.Please dry the earbuds before you put them back into the charging case. Please read the [User Manual] carefully before using. Model: C5Material: ABSColor: black, white, Apricot colorBluetooth version: V 5.3+EDRHorn diameter: 6mmCall duration: 5-7hTransmission distance: 10mFrequency response range: 20-20KHzSensitivity: 102 ± 3dBHeadphone capacity: 40mAhCharging compartment capacity: 300mAhCharging time: 40minVoltage/current: DC5V/1APackaging list: earphones * 1 pair, charging cable * 1, charging compartment * 1, user manual * 1