Our ultramodern, state-of-the-art wall clock shows crisp, readable dials with a low-profile case. Easily view the time, temperature, and humidity from 20 ft. away. The triple display shows precise quartz-crystal timing with 0.01% accuracy, temperatures from -34F° to 116°F and -37°C to 47°C with ±1.5°C accuracy, and relative humidity from 8% to 92% with ±5% accuracy. A bright orange sweeping second hand provides visibility. To ensure accuracy, an individually serial-numbered Traceable^® certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability, for time only, to standards provided by NIST. A low-profile, slim design, ABS plastic, impact-resistant case measures 12-1/2" x 11" x 1" and weighs 1-5/8 lb. Clock-dial diameter measures 9" and temperature and humidity dial diameters measure 3". AA battery, wall mount and screw are included.