Onset’s HOBO MX1101 data logger measures and transmits temperature and relative humidity data wirelessly to mobile devices via Bluetooth Low Energy (BLE) technology. The self-contained wireless data logger, which works with Onset’s HOBOmobile app for logger setup and data management, enables you to access data anytime from mobile device for iOS or Android over a 100-foot range, and it requires no dedicated equipment beyond a mobile device for configuring the logger or reading out data. With Onset’s HOBOmobile app, you can view data in graphs, check the operational status of loggers, configure alarm notifications, and share data files. The logger can calculate minimum, maximum, average, and standard deviation statistics and be configured to trip audible or visual alarms at thresholds you specify. The MX1101 also supports burst logging in which data is logged at a different interval when sensor readings are above or below certain limits. This compact data logger also has a built-in LCD screen to display the current temperature, relative humidity, logging status, battery use, memory consumption, and more. SPECIFICATIONS: Temperature: Range: -20 to 70C (-4 to 158F), Accuracy: +/-0.21C from 0 to 50C (+/-0.38F from 32 to 122F). Relative Humidity: Range: 1 pct to 90 pct (non-condensing), Accuracy: +/-2 pct from 20 pct to 80 pct typical to a maximum of +/-4.5 pct including hysteresis at 25C (77F); below 20 pct and above 80 pct +/-6 pct typical. Memory: 128 KB (84,650 measurements, maximum). Battery Life: 1 year, typical with logging interval of 1 minute. Battery Type: Two AAA 1.5 V alkaline batteries, user replaceable. LCD: Visible from 0 to 50C (32 to 122F); the LCD may react slowly or go blank in temperatures outside this range. Size: 3.66 x 8.48 x 2.29 centimeters (1.44 x 3.34 x 0.9 inches.). Weight: 56 gram (1.98 ounce). Environmental Rating: IP50. CE-Approved. Made in USA.