The Detrum & TomCat programming Card is a must-have for any RC hobbyist. It allows you to program and customize your electronic speed controller (ESC), iStone Stabilizer, and battery without complicated programming devices. Connect with the ESC to set its programmable items. Adjust the stabilizer parameters such as the iStone, MSR66A, Etc. Work as a voltmeter to measure the voltage of the Lipo battery.