The Mastercool Wireless Refrigerant Charging Scale comes with a solenoid (No. 98315) or without a solenoid (No. 98310). Users have the ability to program desired quantities of refrigerant. Before the charge is complete, an alarm will sound allowing ample time to turn off refrigerant supply. This wireless unit prevents unwanted tangles in wires and provides an extremely accurate weight sensor. Users can easily store the remote in the body of the platform, and a magnet on remote allows easy placement on fixtures. A keypad provides synchronization and zeroing. Battery life symbol for platform and remote constantly displayed on LCD and wireless signal strength indicator conveniently displays on remote.