Blackboard device

Simple handheld device which runs off rechargeable batteries that can be recharged by simply slotting into the docking station which runs off the mains. There is a LED ring that runs around the outside of the docking station. the blue light indicates that the docking station is on, green indicates that a payment has been received. There are three lights on the device. Red indicates low battery 25% Amber 50% and Green 100%