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Elegoo EL-KIT-000 37-in-1 Sensor Module Kit for Arduino UNO R3, MEGA, NANOElegoo 37 sensor modules kit is the most complete modules kit for Arduino beginner. It is easy used and funny. The kit has 37 sensor modules, 1 CD with tutorial and 100 pieces resistors packing in a beautiful plastic box. Component listing: 1 x Joystick 1 x Relay 1 x Big sound 1 x Small sound 1 x Tr...$19.99$39.99