KELVIN© Basic 3(TM) Trainer - Sensor - Complete Ex ternal Set   Stock #: 840894 Price: $89.95 Quantity: Quantity in Basket: none BUY IN BULK! Quantity: 3-99999 Price Each: $84.95 SAVE MONEY! Use these sensors instead of the built-in sensors on the BASIC 3 motherboard to build a "Smart House," explore controls, etc. Reaches up to 3 ft. away from the BASIC 3 motherboard. Includes LDR, Thermistor, micro Lever, On/Off, Liquid, Magnetic and microphone sensors.

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