The NEW 98230 Charging Solenoid Module turns the 98210-A ACCU-CHARGE II into an Automatic Programmable Scale! This module allows the user to control the exact amount of refrigerant transferring to and from the A/C System. The compact design is battery powered (9V), lightweight, portable and works with all types of refrigerant. Includes a Short Hose for tank connection, USB Cord and 1/4"FLL - 1/2"ACME Adapters.