PIC microcomputer-based; tests and exercises servos, switchers or speed controllers; checks the centre-stick timing value of your transmitter sticks; run-in motors via ESC. LED bar-graph output display. Powered by a Rx pack (4.8 Volts) or 4 x 1.5v alkaline cells (batteries not included). Available in kit form only. Full instructions, drawings and full-size case cut-out template are included.