1Adopts British CSR5.0 Bluetooth chip with separate connection functions, and connects 2 Bluetooth devices at the same time. 2CVC wideband noise reduction, it will not affect the call even in noisy environment, let you enjoy pure sound. 3With hanging neck design, unique telescopic earbud design, foldable when not in use, enjoy music as you like. 4One-button smart boot, voice function, call vibration reminder, EQ switch, easy to use. 5300 hours super long standby time, it can work continuously for a long time.Features: Adopts British CSR5.0 Bluetooth chip with separate connection functions, and connects 2 Bluetooth devices at the same time.CVC wideband noise reduction, it will not affect the call even in noisy environment, let you enjoy pure sound.With hanging neck design, unique telescopic earbud design, foldable when not in use, enjoy music as you like.One-button smart boot, voice function, call vibration reminder, EQ switch, easy to use.300 hours super long standby time, it can work continuously for a long time.Support for iOS system (for iPhone, etc.) power display and battery prompt.Voice dialing function, clear call, last code redial, call rejection, Chinese and English switching. Specification: Material: ABS Color: Black, Black White(optional) Comply Bluetooth Standard: V5.0 Support: HSP, HFP, A2DP, AVRCP Transmit Power: Class2 Wireless Connection Range: 10m/32.81ft Operating Frequency Range: 2.4026GHz-2.480GHz Charging Time: 3.5 hours Talk Time: 18 hours Playing Time: 16 hours Standby Time: 300 hours Package List: 1 x Earphone 1 x Charging Cable 1 x A Bag of Earbud Cover 1 x Instructions