Sx991 Headphones Model Sx 991 Abs Sx 991 Foldable Neck Hanging Type Telescopic Headset Bluetooth Earphone(Black) (Black) Sx991 Headphones Cvc Wideband Noise Reduction, It Will Not Affect The Call Even In Noisy Environment, Let You Enjoy Pure Sound. Headphone Adopts British Csr5.0 Bluetooth Chip With Separate Connection Functions, And Connects 2 Bluetooth Devices At The Same Time. Sx991 Headphones With Hanging Neck Design, Unique Telescopic Earbud Design, Foldable When Not In Use, Enjoy Music As You Like. Specification: Material: ABS Color: Black, Black White(optional) Comply Bluetooth Standard: V5.0 Support: HSP,, 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