Enjoy great sound quality: With built in intelligent noise cancellation technology and (True Wireless) technology, you can get synchronized stereo connections and high quality audio in our Bluetooth headphones. One button multifunction control: Control small wireless Bluetooth headsets with the exclusive multi touch that can be used as an on off switch for answering ending calls and playing pausing music or videos. Features: Model: i12 Bluetooth headset Bluetooth version: V5.0 EDR, very low power consumption Frequency: 2.4 GHz Microphone sensitivity: 42 db. Range: approx. 13 meters free space Charging time: about 1 2 hours Rechargeable lithium battery headphones: 65 mAh Charging power: DC5V Compatible cell phones: such as iOS iPhone11 11pro X 88 PLUS 7 7PLUS 6 6SP Samsung Android How is the wireless headset paired with the device? 1. Remove both wireless headsets from the cradle 2. They will automatically turn on and pair 3. Then you establish a connection to the device in a few seconds Package content: 2 Bluetooth headphones 1 pack of supplements 1 USB charging cable 1 x instruction manual.