prif PS4 - Crescendo 1 Amplifier - PlayStation 4 Delivers a 20 hour battery boost for your PS4 controller whilst also giving amplified audio in one accessory Lightweight and compact - the module does not interfere with the balance of the controller in your hand Amplifier module has simple controls in reach of your fingertips Ergonomic design that is sympathetic to the look and feel of the official controller Simple to charge via micro-USB