Brand UNI-T Model UT262A Quantity 1 Color Red + Black Special Functions No contact Application Tests phase sequence simple electricity detection breakpiont location live electricity check and line maintenance Resistance ohm Power Supply 2 x AA battery (included) Other Normal phone: 4 phase detection lights rotate clockwise and are lit with intermittent short beeps; Reversed phase: 4 phase detection lights rotate anticlockwise and are lit with continuously short beeps; Live electrictiy: R-S and S-R lights are lit within voltage setting range; Open phase: R-S and S-T lights are not lit; Broken circuit: R-S and S-T lights are not lit; Range of live electricity: AC 70~600V 40~70Hz; Working time: continuous 15 hours; Working temperature and humidity: -10~55'C Below 80% rh. Packing List 1 x No-contact phase-sensitive detector (70cm-length cable) 2 x AA batteries 1 x Protective bag 1 x Strap 1 x English user manual