Image Item No. Description  16521  Electric Power Adapter / Transformer, 100V - 240V / 10V DC - Square Top Catalog: Parts: Electric  bb0806  Electric Sensor - Infrared Seeker, Version 1 Catalog: Parts: Electric  bb0801  Electric Sensor - LogIT Adapter Catalog: Parts: Electric  bb0805  Electric Sensor - Mindstorms RF ID Catalog: Parts: Electric  bb0802  Electric Sensor - NXT Temperature Catalog: Parts: Electric  bb0804  Electric Sensor, Adapter - Mindstorms NXT to Vernier Catalog: Parts: Electric  20844  Electric Sensor, Motion - WeDo 2.0 Catalog: Parts: Electric  20841  Electric Sensor, Tilt - WeDo 2.0 Catalog: Parts: Electric  bb0803  Electric Transponder - Mindstorms Keyfob Catalog: Parts: Electric