Features : Smart and modern design. (Patents Pending) Accuracy : ± 2 cm. or ±1 inch. Display view : normal or mirror view. Offset min. distance : 0, 10, 20, 30 cm. or 0, 4, 8,         12 inch. Sensing angle can be reduced to 20-25% on each         channel. Auto sensor self-checking system. Technical Information : Operating temperature : 0 ± °C ~ 70 ± °C Operating DC voltage : 9.6 V ~ 24 V Low power consumption : current ~ 50 mA. Reverse polarity protection circuit. All spare parts are available.