The Light series pushbutton handsets are distinguished by their low weight (420g including battery) and their small dimensions (185x80x43mm.). Much emphasis has been placed on the operator comfort in high-usage applications - the transmitter's weight distribution, key and clip systems are all ergonomically designed. The system uses light weight Ni-Mh rechargeable batteries, which power the transmitter for up to 12 continuous hours and recharge in 4 hours in an intelligent charger. Each system is supplied complete with 2 batteries and a charger. The system is fail-safe to Category 3 of EN 954-1 for Stop.