Extech rh101 infrared thermometer and hygrometer extech rh101 the extech rh101 infrared thermometer and hygrometer features a super large backlit dual display the main display is user selectable for ir or humidity the secondary always displays ambient temperature the ir thermometer has a laser point to simplify aiming at hard to reach or rotating surfaces supplied with 1 x pp3 9v battery rubber holster humidity temperature sensor and a user manual extech rh101 infrared thermometer