Prif have developed the crescendo 1 via simple controls and with its own contoured battery source the gamer has the chance to increase or reduce game and chat sound as well as mute chat without taking their hands off the controller features delivers up to 20 hours of battery boost for your ps4 controller whilst also giving amplified audio in one accessory battery charges in just 25 hours amplifier module has simple controls in reach of your fingertips simple to charge via micro usb delivers