D941TW Wide Voltage Ultra SpeedDescription Hitec's tradition of striving to continually advance servo technology has led to the new, hugely desirable, 32 bit D Series, comprising the D941TW, D946TW and D951TW. Faster and more precise than ever before the programmable D941TW Ultra Speed servo is compatible with voltages ranging from 4. 8 to 7. 4 and offers a gobsmacking speed of 0. 07 sec 60 at 7. 4 volts. That's not the half of it though, check out the full specification then