ortable Music Every Time: Carry your music anywhere in a sleek and compact charging case. Bluetooth v5.0: Equipped with Bluetooth v5.0, the Hammer KO Truly Wireless Earphones ensures lag-free conversations with no call drops up within a 10-meter radius. Water Resistant: An IPX4 sweat proof rating ensures that the Hammer KO is resistant to sweat and light rain. Full Touch Controls: Play, pause music; answer, reject or end calls; activate Siri and Google Assistant with a few taps. Total 20 Hours Playback Time: KO true wireless earphone delivers up to 5 hours of playback time on a single charge and an additional 20 hours with the charging case.