Märklin H0 - 6021/6040/6002/6022/6070/6071 - Accessories - Six-piece digital control system for Märklin digital 6002 - transformer Company indication with LEDs. 2 pairs of connection clamps. Power output: 52 VA. Output: 16V AC. 1 x 6021 - Control Unit / Control 80 f Central Unit with built-in drive control. This unit combines the functions of 3 devices: 1. Controller to run the locomotives. 2. Booster to supply the model railway with power. 3. Central electronics, that coordinate all the commands of other control devices. The control unit collects and stores all locomotive power and switch commands and sends them as information signals into the track. The control unit can individually address 80 locomotives. 6022 - Central Control The Märklin 6022 Central Control is a central control unit that supplies the rails with AC power and digital information (commands) for the decoders. This central control could mostly be found in starter sets and can digitally control up to 4 locomotives. The used digital locomotive addresses are 10, 20, 30 and 40. 1x 6040 - Keyboard Controller for 16 solenoid accessories. LEDs show the settings for turnouts and signals. The keyboard has coding switches for setting the Keyboard address (1-16). The last valid turnout and signal settings are stored in memory after the layout's power is shut off. 1x 6070: Infrared receiver 1x 6071: This infrared controller 6071 facilitates four wireless controls. Photos are part of the description. Locomotives include a one-month warranty after purchase. If found to be defective within 1 month, it can be returned free of charge within the Netherlands. All packages will be sent by registered and insured mail.