Specifications: Item: Wireless bluetooth earphone Type: Right Earbud Car charger input:DC 12V/24VUSB output of car charger:DC 5V 2.4 Anbsp; (Max) Frequency response range:20HZ-2KHZbluetooth version:5.0 Talk time: about 4hours Music play time: About 3hours Standby time: 24hours Charging voltage/current:5V 1 A How To Use:1. Take out earphone & it will auto-on with a voice promptquot;power onquot; ";pairingquot;2. Enable the bluetooth pairing mode on your phone device. Tap on";RV1quot; to connect.3. Earphonenbsp; will response with a voice prompt"; Connectedquot; & both indicator lights go off.4. Earphone will response with a voice"; Disconnectedquot; when bluetooth signal is cut off, & shutdown 3minutes later automatically.5. When power on, the earphone will connect the last parirednbsp; mobile automatically, if not, pls turn off & repeat step 1 amp; 2. Power Off:1. Touch earphone 8snbsp; to shutdown manually.2. Eaarphone will shutdown automatically in 3mins after disconnected with device.3. The battery of earphone is visible onnbsp; connected device, when its running out of power, the earphone will remind you with a voiceprompt"; Low Batteryquot;, & red indicator flash every 30s, pls recharging in time. Phone + Music:1. To answer a call: Touch earphone one short.2. To end a call: Touch earphone one short.3. To reject a call: Touch either earphone for 1 second.4. To play & pausenbsp; music: Touch earphone one short.5. To play the next song: A triple touch earphone for ne