Non Contact Voltage Tester 12-1000V/48V-1000 Dual Range Voltage Detector Test Pen Adjustable Sensitivity AC Voltage Meter with with LED Indicator Alarm Mode, Live/Null Wire Judgment LED Flashligh

6 Set DC Motor Kit, Rectangular Mini Electric 1.5V-3V 24000RPM Motor with 6 x AA Battery Holder 86PCS Plastic Gears,Mounting Bracket,Boat Rocker Switch,Shaft Propeller for DIV Science Projects

Mini Bluetooth Receiver