Simple, slim digital clock displaying temperature and humidity. Only 1cm thick. Compact and easy to carry. Can be wall-mounted or used with a stand. 96 x 58 x 11mm CR2032 battery x 1 Lithium battery Made in China Includes instructions in Chinese and English 【Time Setting】 ① Long press the S key on the back to enter time setting mode, the hour digits will flash, adjust with the ▲▼ keys. ② Short press the S key to switch the setting point, adjust the flashing minute digits with the ▲▼ keys. ③ Short press the S key to finish setting. A film is inserted to prevent the battery from conducting electricity, please remove it before use. I recently purchased this online. It should have an alarm function, but I couldn't figure out how to use it, so I bought a different one. I'm offering this to someone who can use it. It's almost new, only opened once to set the time. Please understand that it has been stored at home. Please ask any questions before purchasing.