The OEM Martin Yale Electric Letter Opener PRE1632 is designed for mid-size to large businesses, featuring an automatic-feed system for high-volume capacity and hands-free operation. It can open a stack of standard-size business envelopes, up to 1-3/4" tall, at a speed of up to 7,000 envelopes per hour. The fully enclosed blades ensure safety during operation, while the letter catch tray folds for convenient storage. Additionally, the nonskid feet keep the machine securely in place during use.