Tips: 10mA is electronic type. There is a wiring diagram above the test button, please follow the it. The power supply must enter from the top and output from the bottom. The neutral line on the left and the live line on the right. The default rated voltage of the product is 230V. Residual Current Circuit Breaker is applicable to electric circuits with rated voltage 230/400V AC, frequency 50/60Hz and rated current up to 16Amp. The RCCB provides indirect protection to the operator 's body under such condition that the exposed live parts should be connected to a proper earthing pole.The RCCB also provides protection against the fire danger caused by earth fault current due to function failure of over-current protection device. Special tips: 1. RCCB with rated sensitivity up to 10mA could be used as supplementary protecting device in case other protecting device fails its protection against . 2. RCCB designed for household installation and other similar application, is for non-professional operation, and no maintenance is required. 3. RCCB provides on protection against resulted from direct contacts of both protected lines,or leakage current between these two lines. 4. Particular devices such as surge protective devices,surge arrester etc are recommended to install at upstream line to RCCB as precaution against potential surge voltage and current occurring at its power input side. 5. Satisfying conditions and applications as mentioned above,RCCB with "ON-OFF" indicating device is considered suitable for isolation function. color: White Material: ABS Package Contents: 3 x Circuit Breaker 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.