Speaker type : Dynamic, Ear Coupling : Ear Canal, Frequency Range : 5 Hz-21 kHz, Sensitivity : 107 dB SPL (1 kHz / 1 mW), Bluetooth Version : Bluetooth 5.0 Compliant Class 1, Supported Profiles : A2DP; AVRCP; HSP; HFP, Water Protection Code IPX4 Splash Resistant, Type of Codec : SBC; aptX™; aptX™ Low Latency; AAC, Battery Specification : Built-in Lithium Rechargeable Battery, Charging Time : Approx. 1.5 hrs