The CPS Products CC220 Compute-a-Charge Refrigerant Recovery Scale, 220 lb Capacity is a refrigerant charging/recovery scale, calibrated to strict NIST standards. The removable metal scale platform enables use of this product in or out of the protective case. The ergonomic hand held remote incorporates 6ft coil cord, a hanging hook and is backed with a magnet for attaching to metal surfaces. The CC220 operates up to 60 continuous hours on two 9V alkaline batteries and includes an auto power-off feature