s following features: Good reliability, small volume, light weight, specious nice appearance, convenient installation, etc. Functions and features 1. 35mm standard DIN rail installation, complying with standard DIN EN5002. 2. May select5+1 digits register by step typeor7 digits LCD display. 3. May selectinfrared carrier wave communication and RS485 serial port communication. 4. Impulse output when no power, complying with standard DIN43864. 5. May selectnormalorsimple connection.