VIVOHOME 220 LBS High Precision Electronic Digital Refrigerant Charging Weight Scale with Case for HVAC A/C

COMPACT & PORTABLE - Compact, portable battery design; Operates on one 9V battery (battery not included); Three separate display modes for kg、lbs、oz、kg&g、lbs&oz; Digital charging scale capacity is up to 220 pounds and comes with a hard carrying case for extra protection. HIGH-QUALITY BUILD - High-visibility LCD screen and backlight for display; With an extremely large LCD display and backlighting, you'll have no trouble keeping track of your measurements; Professional and high accuracy design can meet your different measure requirements. NON-SLIP DESIGN - Aluminum combined with silicone creates high traction and prevents slippage; VIVOHOME refrigerant charging weight scale has a textured rubber coating on the platform surface, which helps tanks not to fall while measuring. AUTO-SHUT OFF - Automatically shuts off after 10 minutes of non-use; Backlight will shut off after 3 minutes of non-use; This refrigerant scale features an auto-zero button which gives the technician the ability to set the value at zero after the weight of the cylinder is measured, which helps in recording the measurements accurately. FAIL-SAFE DESIGN - Display will state, ""FULL"" when the load exceeds the specified range; This unit is designed with a fail-safe feature that will close the valve in the event of lost power due to low battery voltage or if the unit is accidentally turned off