Features: With Indicating and detecting functions when forward feeding strap positioning. The retry feeding of auto correcting function to correct failure strap. Safety internal control voltage: 24 Volt. All side-sealing models should notice the minimum height of packaging area (from conveyor to the sealing point) must not lower than 100mm. Side-sealing models can equip with minimum 2 photo cells to cooperate with existed fore and hide conveyors with controlling circuitry and the model will add - 2HT in the end.