8.4V servo, good with Lipo 2s Li-Fe 2s battery set up [Control Signal Type] PWM or Xbus [Stall Torque] 17.0 kgf-cm (8.4V) / 236.1 oz-in (8.4V) [Speed] 0.10 Sec/60° (8.4V) [Weight] 64 g / 2.12 oz [diemension] 40 x 20 x 39 mm / 1.57 x 0.79x 1.57 in [Length of lead harness] 300mm [Operating Voltage] 4.5V - 8.4V ■XBUS Programmable ■Coreless motor■Full metal gear■Heat sink case■Double ball bearing ■Neutral : 1500usec