Boyer Bransden Micro Digital Electronic Ignition for Triumph and BSA Unit Singles with 12 Volt positive earth electrics and'distributor' type ignition system. This is a microprocessor controlled electronic ignition system, manufactured by Boyer Bransden, for the BSA and Triumph Unit Singles, with the distributor type points. This will replace your existing points, condenser, and mechanical advance mechanism with an electronic pick-up, and a box to handle the processing and advance. To use this you will require an existing good 12V 5A power supply. It is supplied with a special digital coil, HT lead and the correct spark plug cap (5000 OHM). This is suitable for positive earth only, and requires a battery to be fitted. This does not fit the later models with sidepoints ignition. What's in the box? Electronic Ignition Box Micro-Digital with wires and adhesive foam strips Magnetic Rotor to replace existing mechanical auto advance Stator to replace existing points Ignition coil Spark Plug Cap HT Lead (not in photo) All required wires and connectorsComprehensive Instructions. Boyer Bransden Part Number is KIT00261 or KIT261.