Product Name: Hall Effect Sensor;Model: Y3144;Voltage: 4.5-24V Output Current: 25mA;Temperature Range: -40〜+150 Celsius Terminal Number: 3;Terminal Length: 16mm/ 0.63 Inch Size: 17 x 4 x 1.5mm/ 0.67 Inch x 0.16 Inch x 0.06 Inch (L*W*T) Weight: 3g/Set;Material: Electric Part 1. Stability for Automotive or Industrial Applications. 2. Open-Collector 25 mA Output. Compatible with Digital Logic. 3. Reverse Battery Protection.Solid-State Reliability.Resistant to Physical Stress. 4. Activate with Small, Commercially Available Permanent Magnets. material: plastic Package Contents: 30 x Hall Effect Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.