Warm tips: 1. Because of transport policies in different countries, the 3V CR1220 backup battery and 3.6V ER14250 lithium battery may not be included, please prepare them by yourself 2. If you want another chef version please click: LINK Features Custom made large VFD display reach 160mm * 33mm, DS3231 TXCO clock chip with multiple less error, high precision digital sensor for accurate measurement of temperature and humidity, and use wireless solution to avoid heat interference Supporting display time/year/date/weekday/performance/height, property size but full of vintage style just like IV18 tube, can clearly show the time and add the decoration effects for your home/office desk, bed side, car etc., both practical and beautiful Powered by DC 5V Type-C interface, you can use phone charger to power it, default equipped with high quality Type-C USB cable, very conventional and easy to use at home/office or in car Brightness with auto and manual adjustment, in auto mode the brightness can adjust according to the environment brightness for better visual effects will not disturb your rest and sleep at night Introduction of Wireless Sensor 1. There is a switch under the small hole, using a property tool to press it to turn the sensor on 2. Measure the temperature and humidity per minute, it will send data once if the difference is between the new and the last data over or equal to 0.3 C/0.3% 3. The sensor uses 3.6V ER14250 lithium battery (may be not included), cannot be charged It 1000mAH capacity can last 3-6 months The small change of temp and humi, the longer its service life Parameters Support display: time/year/date/weekday/performance/quantity Display mode: 0. Fixed Time A 1. Fixed Time B 2. Time+Temperature/Time+Humidity (auto switch between two display modes) 3. Time+Temperature/Date+Humidity (auto switch between two display modes) Lightness: auto/manual adjustment Lightness of manual adjustment: 5 levels Time format: 12H/24H RTC chip: DS3231 Accuracy: 2ppn, annual error within 1 minute Backup battery: CR1220 (may not be included) Working voltage: DC 5V Working current: 400mA Interface specification: type-C Dimensions (W * D * H): 166 * 40 * 55mm/6.53 * 1.57 * 2.16in Net weight: 210g/0.46lb Package weight: 300g/0.66lb Packing List 1 * VFD Clock 1 * Wireless Temperature Sensor 1 * USB Cable 1 * User Manual