Product Description: Material: Plastic Color: White Wearable LED test device. Simply plug the LED into the corresponding holes (all of which are labeled) and press the button to see its brightness, light color, etc. Wearable LED Testing Device (2-150mA)Simply plug the LED into the corresponding holes (all of which are labeled) and press the button to check its brightness, light color, etc. The top row is for 2 pin LEDs with currents ranging from 2mA - 30mAW The bottom row is for 4 pin LEDs (piranha LEDs) with currents ranging from 20mA - 150mA Compact and compact Powered by 9V battery (not included)Product Size (L*W*H) : Approx. 8 x 5.5 x 2.2cm / 3.15" x 2.16" x 0.87" Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!