A great affordable easy to use portable speaker system. No wires needed, no Bluetooth needed. Simply place mobile phone on the flat surface and listen as the sound from the internal speaker is amplified. Features : Mini amplifier • 3W output power• DC in: micro USB ( 5V ) • SNR: 85dB • ( 3 x AA batteries not included ) • ABS : 12.4 ( l ) x 6.8 ( w ) x 3.8 ( h ). Add your full colour logo using our Direct to Print method.