Features: [Multipoint ConnectionVoice Reminder] Support connected to 2 smartphones at the same time; smart voice reminder let you know the real-time condition of earbuds. [Double Tap for Re-dial] Enable re-dial the last call by double tap, and battery status display on iOS is available. [Intelligent Noise Cancellation] BT4.1 ensures stable transmission, and intelligent noise canceling technology enables you enjoy clear audio. [Ergonomic Earplug] 7.3g in weight, comes with silicone earplug, HUAWEI Colortooth features lightweight, soft and comfortable, fits your ear perfectly. [Long Standby Time] Under the power saving mode of \'Deep Sleep\', HUAWEI Colortooth can be used up to 120~140 hours.