This Skystars Kramam KM50 ESC runs BLHeli_S firmware and supports 3-6S batteries. It also supports DShot300 and DShot600. This ESC also includes a skull-designed "Skeleton" heatsink for better cooling and protection. SPECIFICATIONS: Continuous current: 50A Burst current: 60A≥ 10S Working voltage: 3-6S LiPo Firmware: BLHeli_S Support: Reversed DShot 300/600 Firmware Version:16.72(Q_H_25) Product size: 41 x 46 x 7.6mm Weight: 0.60oz (17g) Mounting Pattern: 30x30mm INCLUDES: (1) Skystars KM50 50A ESC (4) Rubber Grommets (Red / Pre-Mounted) (1) XT60-H Male Connector (2) Main Lead Connector Wires (Positive & Negative) (1) 35v 560uF Capacitor (2) 8-Pin Housing Connectors (2) 8-Pin Cables