The JD-861 is a battery-powered relative humidity and temperature measuring instrument. It can display three different ambient temperatures, wetbulb temperature and dew point air temperature around its sensor. Features: Digital temperature and humidity sensor, high accuracy with fast measuring speed. LCD display, you can clearly see the humidity, temperature, minimum and maximum value. Short press the M button to toggle between maximum and minimum. Long press the M button for 2 seconds to turn on the auto shut-off and automatically shut down after 30 minutes. The factory default setting is disabled. Short press the buttonButton to switch the temperature unit, the switching sequence: C F & rarr; C Dewpoint-C Wet Bulb-FDewpoint-F WetBulb.Long pressthe Button for 2 seconds to turn on the backlight. The factory default setting is to turn off the backlight. Data hold function: short press the H button to freeze the current reading. Specifications:Name: Temperature & Humidity MeterModel: JD-861Material: ABS Material: 1*6F22 Battery(Not Included)Measuring Range: -30C to 100C(-22F to 212F)Accuracy: 0.5C(25C, 20%RH-80%RH); 0.9 F (77 F, 20% RH-80 % RH); 0.8 C/ 1.5 FHugh Ratio-Range: 0-100% RHDaccuracy: 2% RH (25 C/77 F, 20% RH-80 %RH); 2.5%RH (Other Range)Resolution: 0.1%RHough Operating Environment Temperature 5c-40c (41F-104F) RH: lt; 85% RHo-Condensing Air Pressure: 100kPa-80kPaProduct Size: 155*102*45mm / 6.10*4.02*1.77in Product Weight: 140g / 4.94ouncePackage Size: 160*110*50mm / 6.30*4.33*1, 97in Package Weight: 150g / 5.29ouncePacking List:1*Temperature & Humidity GaugeMany questions about Dropshipping services are following:1. How many orders can you handle per day? We are a large company in Shenzhen, China, with a large warehouse that can handle large orders every day. We ship countless packages every day. We can guarantee the order you request.2. How fast can you process orders? We will arrange the shipment as soon as possible after you pay for your order. Priority delivery for dropshipping order3. Can you ship an order without any receipts, invoices and promotional offer inside the package? Absolutely! No invoices, receipts, promotional offer if you leave notes on the order (if you want, we can deliver.)4. If you need other products? We can supply most of the products you need as much as possible1If you have any other questions, please feel free to