Bluetooth chip: LuodaBluetooth version: 5.01526PHeadphone capacity: 65MAHCharging compartment capacity: 500MAHCharging compartment size: length 7cm, width 2.5cm, height 2.2cmTransmission frequency: 2.4GHZ …… 2.48GHZTransmission distance: 10-15 metersBluetooth protocol: -Hands Free 1.6-Headset 1.1-A2DP 1.2-AVRCP 1.5Packing size: 14.6 * 11 * 4cmTalk time: 3-4 hoursMusic time: 4 hoursPure standby time: 300 hoursCharging times for charging the headset: the headset can be charged about 2.5 timesAccessories: medium ear caps worn on the headsetA pair of large pair of medium size pair of small pair of ear hooks in the accessory bagChinese and English manual X1USB charging cable X1Packing color box