LARGE RECORD CAPACITY – Up to 16000 readings for worry free usage TEMPERATURE & HUMIDITY – Equipped with two sensor for high accuracy logging both temperature and humidity. Temp accuracy：±0.5℃（-20℃~40℃；±0.1℃（other)//Humidity accuracy:±3%RH(25℃,20%~90%RH);±5%RH（other） EASY TO READ – Big multi-function LCD display for easy read and record TWO-WAY RECORD – With two models to save data :full record stop and cyclic recordhium battery or powered via USB CONVENIENT SETTING – Power supply :single-use 3.6V lithium battery or powered via USB/Two pieces of built-in magnets are convenient to fix the data logger onto metal material surface.