GSR 12V-15 drill toot horn attachment

Transform your trusty old cordless Bosch Professional drill into a cordless and extremely loud horn! I built mine with Hella autootive horns TE24 (3FH 007 424-811) connected in parallel to the original motor wires. 

Works with:

GSR 12V-15 (incl. HX/FC-models)

GSR or GSB 10,8V-2-Li (incl. HX model)

What else do you need:

• soldering iron
• some wires and shrinking tube
• DIIN 912 8x25 bolt
• M8 nut