YO212Y High efficiency， easy installation and good stability. Compatible with planes and helicopters. Continuous current: 50A . BEC output: 5.5V/ 4A . Battery : 2-6 Li-polymer batteries/ 5-18 NC batteries.   Package Details Weight: 50.29 g Size: 14.1*8.5*2.5 cm Package Includes 1 × Brushless ESC