Aimitek K2 TWS Bluetooth Earphones True Wireless Earbuds Mini Stereo Music Headsets Function: 1. Support for the left ear ear interconnected, left channel & right channel output independently 2. Single also can be used as a stereo bluetooth headset 3. Wireless phone, wireless music playing Newest Version comes with “Power On/Off” function on the Charging Dock. Model: the TWS – K2 Version: Version 4.1 + EDR Support agreement: HSP, HFP, A2DP, AVRCP Size: 28 * * 28 mm Weight: 5.0 g * 2 + 45 g Standby time: 100 hours Playing time: 2.5 hours Talk Time: 2 hours Color optional: black and silver, silver, red, white Appearance of craft: UV + frosted rubber oil, bluetooth headset charging box of frosted UV Charging box capacity: 450 mah (charge about 3 times) Accessories: charging cable, ear cap, ears hang, manual Charging box size: 80 * 60 * 30 mm How to Pair K2 earbuds? 1. Long press left and right mini earbuds together until two indicators light flash alternately with red and blue light. 2. Open the bluetooth of your music devices, to search “TWS-K2” and pair it. 3. When the automatic prompt voice in mini earbuds says “Second device connected”, it means earbuds connects with bluetooth devices successfully. Please note: When calling, only the Left Channel Earbud has voice. This safety feature allows you hear the traffic while driving. Package Include: 2 x K2 Earbuds 3 x Spare Ear Tips( L/M/S) 1 x Charging Box 1 x Usb Charging Cable 1 x User Manual Note: Without original retail package box. If you need the box, . >>> Buy Ear Hooks, .