Twin Meter NEO, which can measure temperature and humidity simultaneously. - Model: Twin Meter NEO - Thermometer range: -20°C to +50°C - Hygrometer range: 0% to 100% Thank you for viewing. I am selling this because I accidentally purchased multiple units. I use this in my leopard gecko and crested gecko terrariums, and it's very convenient because the readings change quickly compared to digital meters when misting to raise the humidity. Thank you.