Model Number: S657 Key Specifications/Special Features: time and calendardual alarms and snoozein/out temperature and humidity and relative trend indicatorone receiver can link with 3 outdoor sensor at most through CH1, CH2, CH3indoor comfort lever indicatorin/out temperature alert and settingsimulant weather forecast (6 types of weather forecast)low battery detector for sensorUSB charging function for option (incl.)VA displayMaterial: ABS /receiver, ABS/outdoor sensorSize: receiver/21.2L x 13.9W x 2.6Hcm, sensor/9.2L x 5.6W x 2.6HcmColour: white/blackReceiving range: Dia. 60 - 100mTemperture range: indoor 0°C - 50°C, outdoor -30°C - 60°C, +/- 1°CTime tolerance: +/- 2seconds/day
Humidity scope: indoor and outdoor 20% - 95%, +/- 5%
Batteries are not included(AAA x 3pcs for receiver, AAA x 2 for outdoor sensor)