• Bluetooth Wireless Connection: Real-time monitoring of temperature (-20 to 65 ℃) and humidity (0-100% RH) through the mobile app. • Higher Accuracy: Temperature error of ±0.5 ℃ and humidity error of ±5%, with updates every second for optimal accuracy. • Data Storage and Export: Records data every 10 minutes and stores up to 100 days of information. Free export in CSV format. • Smart App with Notifications: Set monitoring ranges and receive notifications when data is out of the preset range. • Mini Compact Size: Compact design of 1.5 x 1.5 x 0.62 inches, easy to carry and with a hanging hole. CR2477 battery with a lifespan of approximately 1 year, user-replaceable.