Three channels Wireless Smart Datalogger - Indoor temperature, relative humidity (temperature accuracy: 0.2 °C from 0 to 50°C - 0.01°C resolution - humidity: ±2% (typical) at 25°C, 0-100% RH) and PT1000 input - Type "AA" lithium internal battery for a battery life up to 5 years with samples every 10 minutes.