1、LCD DISPLAY: Battery meter is equipped with a large backlit LCD display, which can visualize the battery type, remaining charge, total voltage and so on. 2、MULTIFUNCTION: Battery meter supports battery capacity testing, voltage balancing, built in resistance, battery discharge, ESC or servo or PPM testing. 3、OPTIMIZE PERFORMANCE: digital battery checker helps to optimize battery performance and extend overall battery life by ensuring individual cells are balanced. 4、WIDELY APPLICABLE: The battery meter displays the estimated capacity and voltage of lithium polymer, lithium iron, lithium ion, NiMH battery, NiCad battery packs and quickly check if the battery needs to be charged before use. 5、SERVO TEST: Digital battery tester supports wide and narrow frequency servo test, can manually test servo rotation, servo center position, servo automatically swing left and right, adjustable swing speed.