Frequency Response 20Hz-20KHz Charging Time - 1.5 hours, Standby Time - 150 hours, Talktime - 6 hours. boAt Rockerz 255, while being lightweight in design pumps out your favourite tunes with powerful HD sound and deep boosted bass Enjoy smooth connectivity via its Bluetooth 5.0 Technology Built with uncompromised craftsmanship from premium materials including metal housing earphones and chrome accents, the boAt Rockerz 255 is both sturdy and stylish. With the inline controls you can toggle the volume, skip tracks, attend calls, and activate Siri or Google Now voice-controlled Smartphone assistants With the wireless functionality and free access controls, the boAt Rockerz 255 is surely your companion for your travel and daily needs, stay edgy with voice command