Manual: Chinese and English 1 x data cable Talk time: 5h Communication distance: 10m 2 x ear caps talking distance: <1M Multipoint connection: not supported Sensitivity: 92db ± 3db Bluetooth working frequency: 2.402GH-z-2.480GH-z Maximum transmission distance: 10M Charging compartment capacity: 390mAh Frequency response range: 20Hz-20kHz Headphone net weight: 42g • Can answer with both ears during a call Charging time: 1.5h Wearing method: In-ear Impedance: 32Ω • Standby time 150 hours • Ergonomic design, fits comfortably and does not drop. Frequency response range: 20-20000Hz Product Color: Black Bluetooth version: 5.0 1 x charging compartment Standby time: 300h 2 x headphones Model: • Automatic pairing mode when you the headset, no need to press the button Input charging standard: 5V Supported protocols: HSP, HFP, A2DP, AVRCP Earphone capacity: 45mAh • binaural wireless, you can also choose mono or binaural mode to use. Voice prompt: Support • Stylish portable charging compartment can charge the headset Music time: 4h • IPX4 / sweatproof function. Ear Phones Cordless Noise Earbuds