SW1___________2 poles 6 ways Rotary Switch (see notes) SW2___________SPST Slider Switch BZ1___________Piezo sounder (incorporating 3KHz oscillator) B1____________3V Battery (two 1.5V AA or AAA cells in series etc.) NOTES Needing only one time set suitable for your own skin type, the rotary switch can be replaced by hard-wired links. A DIP-Switch can