Item Type: Timer Housing Material: ABS + Metal Model: CH-918 Color: Black Temperature Measurement Range: -10℃-50℃ (14℉-122℉) Humidity Measurement Range: 10%-99% Countdown Range: Longest 23 hours 59 minutes 59 seconds; shortest 1 minute Temperature Error: 0℃-40℃; ±1℃, Others: ±2℃ Humidity Error: ±3% Measurement Resolution: Temperature 0.1℃/0.1℉; Humidity 1%RH Temperature Measurement Cycle: 10s Power Supply Mode: 2 x AAA Battery (Not Included) Screen Size: Approx. 58 x 27 mm / 2.3 x 1.1 in Product Size: Approx. 78 x 24.5 mm / 3.1 x 1 in Weight: Approx. 134g / 4.7oz 1、Long timing setting, with timing and countdown functions, the timer can be set up to a maximum of 23 hours 59 minutes and 59 seconds; the shortest is 1 minute. Suitable for long time work, study, cooking, etc. 2、Multifunctional, it can measure indoor temperature and humidity, with time function, timer function, countdown function, backlight function and alarm prompt function. 3、Convenient for storage and placement, the back cover with bracket and 2 magnets, which can be absorbed on the water tank or air conditioner, or place it directly on the table. 4、Adopts high quality metal frame, safe, reliable, bright and durable for long time use. The display screen adopts mirror surface, white backlight, easy to display and read. 5、Air convection and symmetrical style, Symmetrically designed air inlet holes on both sides create a large amount of air circulation to ensure a large area of air to enter, ensuring accurate temperature and humidity data.