Check the listing for details. BSIDE BTH02 Waterproof Two Channel Temperature Humidity Dew Point Data Logger US. Condition: New. Listed at 54.41 USD. BSIDE BTH02 Waterproof Two Channel Temperature Humidity Dew Point Data Logger Specifications:1. Relative Humidity: Measurement Range: 0 ~ 100%RH Resolution: ±3%R 0.1%RH 2. Temperature: Measuring Range: -35 ~ 80℃ (-31 ~ 176℉) Resolution: ±0.3℃(±0.5℉) 0.1 ℃(0.2 ℉) 3. Storage Space: 64KBytes(Total 32000 Readings) 4. Sampling Rate: Can be selected from 10 seconds to 12 hours 5. Power Supply: Replaceable 3.6V 1/2AA Lithium Battery 1200mAh 6. Battery Life: Approx. 3 Years @ 1 Minute Sample Rate 7. Material: ABS, TPU, PC 8. Color: Blue 9. Dimensions: (4.84 x 1.46 x 0.91)" / (12.3 x 3.7 x 2.3)cm (L x W x H) 10. Weight: 2.96 oz / 84 g Package Includes: 1 x Logger 1 x Mounting BracketShipping: US order will ship from USA, all other orders will ship from China,most countries’ customers can track package on-line on their post office website, thank you