Music playback more than 7 hours 10mm dynamic speakers for louder and latest Bluetooth version 5.0 is used for HD sound quality. Magnetic lock: Premium and durable magnets, attach the two earphones together when the neckband is not being used durable Flexi-band- the light yet sturdy, neckband can drape comfortably across the neck with supreme comfort and in-line controls built-in mic: For HD calls and Siri/google assistant voice command, powerfully sculpted audio that produces a dynamic sound with clean heavy bass with the inline controls you can toggle the volume, skip tracks, attend calls, and activate Siri/google assistant smartphone assistants compatibility: Works with all os, all Bluetooth enabled smartphones, laptops, pcs, tablets, smart TVs, from all the brands automatically connects back to the earlier connected phone auto turn-off without Bluetooth connection.