Hygiplas Easytemp Thermometer. Hygiplas Easytemp thermometers feature a fold away probe and auto on/off facility to conserve battery power. Accurate, reliable and robust these pocket thermometers are supplied with a detachable wrist strap and AAA battery – ready to work immediately. Fold away probe for easy storage of thermometer. Auto on / off facility to conserve thermometer battery power. Detachable wrist strap. Thermometer is supplied with a battery. Power Type 1 x AAA battery. Temperature Range -50 to +300 degrees Celsius. Resolution 0.1 degrees centigrade. Response Time 15 seconds (approx).