Note: This item just include the Mouse traps,not include the Co2 cylinder and bait,and the screw diameter of the Co2 cylinder is : 3/8 inch,Please buy it yourself Features: 1. Using non-toxic, high efficiency hormone bait to lure mouse near the trap 2. When mouse climbs into the hole, and the launch setting of the strike plate will be triggered, then kills mouse immediately 3. The dead mouse falls down, the strike plate will automatic reset, wait for next mouse to come 4. No need to electrify it, just install the trap 5. Durable ABS plastic material, avoid mouse biting the trap to destroy it 6. Multi-catch design helps you kill many mice at one night, say good bye to mouse Specification: Name: Fully automatic intelligent rodent killer Size: 240 * 220 * 82mm Color: as show Packing included: 1 * Fully automatic intelligent rodent killer(Without cylinder and bait) Note: 1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting. 2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.