Led Buddy can help you design any electronic circuit that contains one or more LEDs. Hold any type of joint to the contact pads on the joint mate to start the process. It detects the polarity of the LED, measures the forward tension and automatically calculates the series resistances you need to use. The compact size and durable materials ensure that this useful tool is the best mate any manufacturer can have. No more circuit problems . Basic product information: •• Operating manual Languages: Dutch, English, French, German, Spanish •• Primary colors: Green •• Additional colors: Black •• Depth Unit: 4.8 cm •• Height Unit: 3.2 cm •• Width Unit: 7.5 cm •• Weight Unit: 84 g • Technical data: •• Specifications Kit & Modules: Features 8 X 2 characters LCD Autocalculates the series resistance (E12 series) Detects an LED&rsquo, S polarity Measures Led&rsquo,S forward voltage Adjustable target current Adjustable target voltage Connector pads Switch Specifications Calculated voltage Adjustable from: 0&ndash, 30 V Rated current Adjustable from: 2&ndash, 26 Ma Power consumption: 40 Ma (when testing an LED) Power supply: 9 to 12 Vdc Max. Or 9 V battery (not included) • Operational characteristics: •• Coding level: None •• Electronics skill level: 2 •• Mechanics Skill Level: 2 •• Soldering Skill Level: 2.