With OBELISK top3, time switching programmes and direct commands can be transferred reliably and conveniently from the app to the top3 timer via Bluetooth Low Energy. Maximum tamper protection: Timer programmes can only be transferred if the OBELISK top3 stick is inserted in the switching clock. The dongle also has an integrated memory function (EEPROM). The top3 OBELISK is a memory card for all top3 and top2 devices in network operation and can be used as a backup for time programmes.