THERMOMETER Features:  • Quick and easy, a hand-held non-contact temperature measurement • For temperature monitoring -- 3445 with real-time output • Dedicated software ( option) -- For date analysis and management • Use in tough environments -- dust/ splash-proof design ( IP54)  • Two-beam laser marker • Ø 2.5 mm at a 7.3 cm distance Basic specifications Measurement range: -50.0 ° C to 500.0 ° C, 0.1 or 1 ° C resolution switchable Measurement field diameter ( normal) : Ø 2.5 mm( 0.10 in) at a distance of 7.3 cm( 2.87 in)  Accuracy     ± 1 % rdg.: ( at 200.1 to 500.0 ° C) , ± 2 ° C ( at 0.0 to 200.0 ° C) , ± 10 % rdg. ± 2 ° C ( at -50.0 to -0.1 ° C)  Response time: 1.6 sec ( 95 % at 0.1 ° C resolution) , 0.7 sec ( 95 % at 1 ° C resolution)  Date memory function: None Analog output function: Possible ( requires INTERFACE PACK 3909)  Interface: RS-232C output ( requires INTERFACE PACK 3909)  Other functions: Two-beam laser marker, auto power save, low battery warning, etc.,  Power supply: 6F22( 006P) × 1, or AC adapter Operating time: Continuous use of 20 hours ( light on) and 50 hours ( light off)  Dimensions, mass: 47 mm( 1.85 in) W × 200 mm( 7.87 in) H × 48 mm( 1.89 in) D, 280 g ( 9.9 oz)