display unit with time, date and weekday, indoor temperature and humidity, comfortable alarm setting and additional functions via Bluetooth (BLE 4.0) with free smartphone app (German/English), automatic time synchronization, graphic display of indoor temperature and humidity, up to 5 different alarm times can be programmed (single alarm, weekday, weekend…), alarm sound, alarm duration, volume and snooze functions are individually adjustable, timer Range: T in: -40°C…+70°C ( -40 °F +158 °F) , H in: 20…90% wall mounting or table standing, 230 x 33 (76) x 145 mm, 375 g 2 x 1,5 V AA batteries included, EK-EL Compatibility: for iPhone 4s, iPhone5/5C/5S, iPhone 6/6 plus, iPad Retina display, iPad mini, iPod Touch 5. generation (iOS 7.0 or newer) and Android (4.3 or newer)