Zeny Portable 220 Lbs Digital Refrigerant Electronic Charging Scale HVAC AC R134a Manifold Gauge Set With Case (Electronic Scale & Manifold Gauge Set) Three display modes: kgs, lbs and oz. Extra large LCD display with background lamp Slip-Resistant 9" x 9" weighing Platform Built-in memory remembers previous reading Flexible long coil design Rugged, compact design, completely portable High accuracy and resolution Can be used with all refrigerants