Hitecs lightweight HFP-30 Field Programmer represents the latest in digital servo testing and programming units. Packed with advanced features and a large, easy-to-read LCD screen, it efficiently programs all Hitec digital servos, including the HS-5XXX, HS-7XXX, brushless HSB-9XXX and the latest D-Series. Operating on a wide voltage range of 4.8 to 8.4, the Hitec HFP-30 is a must-have accessory that youll quickly find indispensable.