Features: Bluetooth 5.1 faster & more stable: Bluetooth 5.1 chip for HIFI original sound with stronger anti-interference performance and more stable signal transmission. IPX4 waterproof for unfettered exercises: Effectively prevent the erosion from sweat & rain in the entire exercise process. 210H standby time enjoy oneself to the full : By virtue of large- capacity battery,long battery life,and lower power consumption,there is no need for long and frequent charging. Both earbuds are Hosts both earbuds are main enginedd: The both earbuds are equipped with airoha chips, which can be used in series or separately. One-touch operation mini & handy: By tapping the earbuds,you can easily with music,adjust volume,answer/ting off the phone,ect. Contact us if you want to order green,purple,blue color . Specifications: Bluetooth : 5.3 Supported Protocols: HSP, HFP, A2DP, AVRCP Battery Capacity of Single Earbud: 45mAh Battery Capacity of Charging Case: 350mAh Colors: Black/White/Green/Purple/Blue Talk Time: 8H Play Time: 7H Earbuds Play for 35h at 80% Volume with Charging Case Standby Time: 210H Charging Time: 1.5H Maximum Transmission Distance: 10M Multipoint Connection: Nonsupport Wearing Style: In-Ear Manual: Chinese and English Pairing method: 1. Take the headset out of the charging compartment and turn it on until the red and blue lights flash alternately and the machine enters the search pairing state. 2. Activate the Bluetooth function of the mobile phone or other device, if it is an Android phone or device, please click the "Search Bluetooth device" option on the phone, if it is an IOS system phone or device, it will automatically search for the device; when the model of the Bluetooth headset is found After that, click to enter the pairing; when the pairing is successful, the headset will emit a notification sound that the connection is successful, and the headset indicator will flash slowly in blue and enter the connection standby state. Package Include: 2 * Bluetooth Earphone 1 * Charging Box 1 * Charging cable 1 * User's manual