PICO 4 - Imagination, the Only Limitation. It might be small, but wearing it makes a big difference. Balanced design, easy to wear. The balanced design means that the weight of the PICO 4 is evenly distributed to the front and the rear. The center of gravity fits snugly up against the face. The rear has cushioned support. The result is a superbly comfortable fit. The front does not sway to and for and the rear does not slip downwards. It is highly stable. At the rear there is a high capacity 5300mAh battery.