This is the Phoenix Ice 100 33.6V Electronic Speed Control from Castle Creations. FEATURES: Recommended for enclosed installations in helicopter and sport airplane applications where cooling is an issue Heatsink equipped for efficient heat dissipation Onboard Data Logging Switching BEC Handles up to 8S (33.6V) INCLUDES: Phoenix Ice 100 33.6V Electronic Speed Control with universal receiver connector, pre-tinned battery and motor leads REQUIRES: Installation between motor, battery and receiver SPECS: Length: 2.6" (66mm) Width: 1.3" (33mm) Height: 0.9" (22.9mm) Weight: 2.4 oz (69.2g) without wires 4.3oz (122.5g) with wires Max Amps: 100A, 5A BEC Max Volts: 34V (8S Lipo, 22S NiCd/NiMH) jxs 7/21/09 ir/jxs updt jxs 11/30/11