... , Allowable working voltage: DC5V, 12V,24V. 4, Far Distance: 1 km (metal wire resistance ≤ 390 ω) 5, The ambient temperature: -40 ~ +65 ... ,Allowable working voltage: DC5V, 12V, 24V.4,Far Distance: 1 km (metal wire resistance ≤ 390 ω)5,The ambient temperature: -40 ~ +65 ...