Wera Belt Torx® Bit Socket Set With Holding Function 1 2" Drive 6 Piece 003997 discount_2 13 x 20mm metric Vortex KINK5009 13 x 20mm metric Vortex sockets and 5 accessories is more than 150 hours Automatic shut down Meter automatically shuts down after 15 minutes of inactivity Safety and Environmental Specifications General safety IEC 61010 1: Pollution Degree 2 Measurement safety IEC 61010 2 032: CAT III 600 V CAT IV 300 V Operating temperature 10 °C to +50 °C Storage temperature 40 °C to +60 °C Operating humidity Non condensing (<10 °C) 90% relative humidity (10 °C to 30 °C) 75% relative humidity (30 °C to 40 °C) 45% relative humidity (40 °C to 50 °C) Protection class IEC 60529: IP30 (jaw closed) Operating altitude 2000 m Storage altitude 12000 m Current sensor action category IEC 61557 13: Class 1 1 x TX 30x60 8767 C HF: 1 x TX 25x60