White Available (multiple) Support with all Bluetooth-enabled devices, such as iPhone, iPad, Samsung,Huawei,Xiaomi,Oppo, Vivo, Nokia, HTC, Tablets, etc. HOW TO USE: 1. Please check if the headset has entered pairing mode. 2.The name of this earphone would be 7s-tws; 3.Consider it is so small size, you need to adjust the volume on your smart phone, there is only one key button on the earphone, for power on/off/answer or reject phone calls. IF NOT CONNECT: Please do as this step to reset the connect: 1.Please make sure you has deleted all tws-7s in your phone bluetooth list, then Long press the multifunction button of two earbuds at the same time until the led flash in blue and red alternately, you will hear a voice says Power on. 2.Click either side of the multifunction key for 2 seconds until you hear a voice doo, there would be a reminding voice says Connected or Paired. 3.Turn on the phone Bluetooth and search tws-7s to connect. When the led flash slowly in blue, they paired successfully. Type 1 :Single(without charging box) Anti-skid Color:black,white,red, rose gold, white Bluetooth version:bluetooth V4.1 Battery capacity: 6maH Size:50*1.2*1mm Weight:90g Charging voltage：5.0V Standby time:120 hours Charge time:1 hours Transmission range:10m Package : 1x Bluetooth Earphone 1x Charging Cable 1x Manual Type 2 :Twins(with charging box) Anti-skid Color:black,white,red,gold,rose gold (optional) Driver: 15mm Impedance: 32 OHM Bluetooth version: Bluetooth v4.2 + EDR Bluetooth use band: 2.4GHz Power level: CLASS II Output power: 30mW Bluetooth distance: 10 meters barrier Frequency response: 20-20000Hz Operating voltage range: 3.0V-4.2V Mic sensitivity: -42dB With A2DP / AVRCP high quality stereo audio transmission and remote control protocol Powerful noise de-noising circuit (active noise reduction) switch between Chinese and English (boot does not connect Bluetooth state, press the switch 2 times, hear the tone switch...