Havit OWS915 Wireless TWS Earphones (Black). Product features:. Left earphone battery capacity: 50 mAh; Earphone sensitivity: 118 dB; Charging case weight: 77.8 g; Battery capacity (charging case): 1000 mAh; Market segment: Consumer; Product depth: 14.5 mm; Charging time: 2.5 h; Color: Black; Connection method: True Wireless Stereo (TWS); Product width: 42.8 mm; Frequency response: 20 - 20000 Hz; Right earphone battery capacity: 50 mAh; Product height: 41.5 mm; Impedance: 32; Wireless router range: 10 m; Application: Calls/music; Number of built-in microphones: 2; Warning : Do not use near heat or fire., Check the battery status regularly to prevent leakage., Keep out of reach of children.; Speaker diameter : 1.42 cm; Right earphone weight : 7.9 g; Bluetooth : Yes; Music playback time : 8.5 h; Microphone type : Built-in microphone; Left earphone weight : 7.9 g; Continuous audio playback time (with charging case) : 64 h; Product type : Headphones; IP rating : IPX5; Bluetooth version : 5.4; Bluetooth profiles : HSP; Charging case dimensions (WxDxH) : 88 x 59 x 28 mm;.