Feature: 1. This temperature recorder has two reading methods, computer reading and APP reading. 2. 32000 data storage can record continuously for 180 days, recording interval 1-255 minutes. 3. This temperature logger is applicable to all aspects of the pharmaceutical cold chain, and can be used to detect, track, and record the temperature of vaccine drugs. 4. Built-in 3.0V button battery, this temperature logger is very convenient to use when get it. 5. The operation is simple, user can manually press the key when starting, or software timing. Specification: Item Type: NFC Temperature Data Logger Model: TTE35123 Usage: One-time use Temperature Measurement Range: -30℃ to 70℃(-4℉ to 158℉) Temperature Measurement Accuracy: ±0.5℃/ 0.9℉ Resolution: 0.1 Data Recording Capacity: 32000 Battery: 3.0V button built-in battery (CR2450) 600mAh Recording Interval: 1-255 minutes, configurable Battery Life: 180 days (1 minute sampling interval) Communication Method: USB2.0 (computer), Bluetooth (mobile APP) Start Mode: Manual button/software timing Stop Mode: Manual / full stop. Package List: 1 x NFC Temperature Data Logger