Earphone, SX 991 Foldable Neck SX 991 Foldable Neck Hanging Type Telescopic Headset Earphone(Black) (Black) Noise Reduction Design: CVC broadband noise reduction design can reduce noise, even in a noisy environment, it will not affect the call, and provide you with smooth and clear sound quality. One-button Control: One-button button design, one-button intelligent start, voice function, call vibration reminder, EQ switch, simple operation. Smart 5.0: Using the CSR5.0 Smart chip with separate connection function, it can connect 2 Smart devices at the same time. It has a stable and fast audio connection with a transmission distance of up to 10 meters. It can easily connect to your Smart device, and can maintain stable transmission. Specification Features: Adopts British CSR5.0 chip with separate connection functions, and connects 2 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 Standard: V5.0 Support: HSP, HFP, A2DP, AVRCP Transmit Power: Class2 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 How to Use Package List Note