Letter opener requires 4 AA batteries (not included). Install the 4 AA batteries in the correct way: 1, Hold the lower cover with your left hand, press the "PUSH" buttons on both sides of the upper cover firmly with your right hand. 2, Take out the internal structure, put 2 AA batteries on the front side of the internal structure (make sure of the +/- direction), and put 2 AA batteries on the reverse side of the internal structure. 3, Put on the upper and lower covers and start working

Efficient Electric Letter Opener: Our letter opener envelope slitter can open the envelope in 3 seconds, saving your time. The envelope opener has a cut size of 0.07 inches that won't shred your mail, making it easy for you to better sort your mail. Efficient office supplies can help streamline your daily tasks and improve efficiency

Safer to Use: Our mail opener can make your fingers completely free from contacting the blade than traditional letter opener knife, fully protecting your fingers. Our letter openers is small and compact, measuring 2.75*2.75*1.5inch and weighing 0.3lbs, it can be kept in your home, office, bag, and keep your envelopes clean and tidy in any occasion

Easy to Use & Save Hand Power: Our mail opener tool is ergonomically designed for hand operation. Insert the envelope you want to open along the arrow from the left side, (please put only one piece at a time, do not put anything other than the envelope) can be opened effortlessly, reducing the wear and tear on your hands and wrists

Perfect Gift: Our letter opener saves time and effort, perfect for the elderly, this is the perfect gift for people who often open envelopes, can be given to dad, mom, friend, husband, grandparents, grandmother on Christmas, birthday, Valentine's Day, Mother's Day, Father's Day