Programmable wireless thermostat VRT 260f (868 MHz) Control characteristics: PI or off/on Operating voltage controller: 2 x 1.5 V AAA Protection class: IP30 Transmission power: < 10 mW Height x width x depth: 135 x 81 x 22 mm Display: 40 x 40 mm Product advantages Weekly program Holiday program Open window detection (with magnetic contact accessory)