Material:It is made of high quality material for electronic accessories and is treated with nickel plated surface, which has excellent performance against oxidation, electrical conductivity and durability. The inner conductor is made of pure copper. It is durable and long-lasting for you. Sensor Specification: Operating Power: 5V Output Power: 100mV/A Sensor size: 3.1 cm x 1.3 cm. This ACS712 current sensor can measure current up to 5A and is easy to install thanks to its compact dimensions. This range module is the current sensor chip ACS712ELC-5A. ACS712 is based on the principle of hall detection, please try to avoid the influence of the magnetic field when using it. Material: electronic components Color: as shown Package Contents: 10 x Power Sensor Board 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.