Bluetooth headset model: xi9 Bluetooth version: Bluetooth V5.0 Bluetooth solution: Lodah AB1526P Type: TWS binaural stereo Bluetooth headset Headphone battery capacity: 60mah Call duration: 6 hours Music duration: 3-4 hours Charging capacity: 500mah Charging times: 3 times Use time: 15 hours Standby time: 75 hours Headphone charging time: 1-1.5 hours Battery compartment charging time: 1-1.5 hours Charging input standard: DC-5V/1A Bluetooth operating frequency: 2.402GHz-2.480GHz9 Calling distance: ≤ 30 meters Bluetooth wireless distance: ≤ 30 meters (depending on the environment and connected equipment) Product Features 1. Listening to songs and phone calls, supporting listening to songs and making phone calls; 2. Adjust the up and down songs, and take you into the music age every time you touch it; 3. Voice answering, intelligent English tone prompts, power on, pairing, power off and off the phone, etc. 4. Apple mobile phone, Xiaomi mobile phone There is power display, you can watch the power of the headset at any time, don't worry about the lack of power in the headset, let you live without worry; 5. When the Bluetooth headset is connected to the phone and turned off, the Bluetooth headset will automatically connect back to the phone when it is turned on, which is convenient and faster; 6. Smart compatibility: support all mobile phones with Bluetooth function, tablet, notebook, sing bar, music, movies, etc.