IBS-TH2 Waterproof Bluetooth Magnetic TemperatureMeter App Alarm Remote Control Data Logger Kitchen Refrigerator Thermometer IBS-TH2 Single Temperature Sensor without External Probe Highlights: SplashProof: Splash proof-IPX4 grade. Products can be placed directly in the freezer. Bluetooth Connection: Max 98ft remote control, -40~60/-40~140. Measurement range, 0.5/0.9 high accuracy, support turning on/off Bluetooth manually. APP Control: Supports temperature graph, interrecord gap setting, alarm and remote control.One mobile phone can monitor more than one sensor, and one sensor can be monitored by more than one mobile phone. Data Storage & Sampling Interval: Hold data for 20 days if the sampling interval is 1min, and the max date storage is 30000 points. Different sampling interval can be setting.(10s/ 30s/ 1min/ 2mins/ 5mins/ 10mins/ 30mins) The saving data time will be different if you choose different sampling interval. Convenient APP & Multiple Devices: The Bluetooth version is upgraded to 5.0. Free APP (Engbird) can be applied to IOS and Android system, which supports multi-language. History and immediacy data can be remotely checked through Bluetooth.Supports connecting to the gateway. Multiple sensors can be connected. Energy Saving&Space Saving: You can enjoy 3-6 months of continuous usewith two AAA batteries inserted. The compact sizeproductwithbuilt-inmagnetiseasy to place in multiple locations. Magnet&Waterproof: IPX4 rated protection, rust-proof and spill-resistant, available to use in refrigerators and other damp places, provide accurate data in cold and moist environments. Multiple Devices: A thermometer can be connected to multiple phones and a phone supportsmultiplethermometers, your family members or friends can monitor and control the same device simultaneously. Specification: Brand: INKBIRD Model: IBS-TH2 Thermometer Digital Bluetooth Temperature Meter Bluetooth Connection Range: 30 meters (98ft) TemperatureMeasurementRange: -40~60/-40~140 Temperature Accuracy: 0.5/0.9 Battery: AAA Battery*2 (not included) Magnetic Back: Yes Waterproof Level: IPX4