1. A multi-function button design, with a beautiful button light and LED power display.2. True wireless headset, using Bluetooth 5.0 chip, faster transmission and more stable signal.3. Using CVC8.0 intelligent noise reduction technology, even in a noisy environment, you can still enjoy HiFi sound music or high-definition calls.4. The charging box can be used as a mobile phone stand, freeing your hands when watching TV.5. The headset can be used to answer/reject calls, skip/play/pause songs, and activate voice assistants such as Siri and Android voice assistants. Intelligent voice reminder to help you know the real-time status of the headset.Specification:Colour: BlackBluetooth version: Bluetooth 5.0Transmission distance: 10 metersBluetooth working frequency: 2.4G-2.485GHzCharging box battery: 993035 / 3.7v / 800mAhHeadphone battery: 401025 / 3.7v / 70mAh *2Charging box battery: 993035 / 3.7v / 800mAhWorking time: 6-7 hoursStandby time: 120 hoursCharging time: about 1-2 hoursConnection mode: single/double free useFunctions: music play/pause, answer noise reduction, IOS power display, voice prompt.1) Turn on/off* Power on: Take both earbuds out of the charging case, then search for the pairing name "Rambotech RP12"* Power off: put both earbuds back into the charging case2) Listen to music* Play/pause music: short press (R & L)* Previous song: double tap the left earphone* Next song: Double-click the right earphone* Decrease the volume: Double tap the left earphone* Volume up: Double tap the right earphone3) make a phone call * Answer a call: click on an incoming call * Hang up: One click while on a call *Rejection: Long press for about 2 seconds4) Activate Siri: Long press the multi-function button for about 2 seconds5) Reset the headset: press and hold the multi-function button for about 10 seconds in the off state