Three channels Wireless Smart Datalogger - Indoor temperature, relative humidity and light intensity (temperature accuracy: 0.2°C from 0 to 50°C range - resolution 0.01°C - relative humidity: ±2,5% at 25°C, from 0 to 90% - light intensity with 4 scales 1, 4, 16, 64Klux) - Type "AA" lithium internal battery for a battery life up to 5 years with samples every ten minutes.