bonsaii 14-sheet office paper shredder, 30-minute continuous running time, credit card/staples cross-cut shredders for home use heavy duty, quiet shredding machine with jam proof system (c169-b) bonsaii <strong>advanced cooling technology: 30 minutes continuous running time</strong><br> bonsaii evershred c169-b will continuous shredding 30 minutes normally , which means 3500 sheets of paper can be destroyed completely without stopping and will only need 10 minutes to cool down with patented cooling technology to restart work. this design will save much time for you when mass documents waiting to shred and you will never feel so easy to get back to your life with the peace of mind that your confidential information are safe. <br><br><strong>jam protection system </strong><br> this office shredder is equipped with an ultra-reliable and ultra-durable automatic anti-jam system. advanced jam detection automatically reverses the machine when over-loading to prevent the jam happening in the first place. bonsaii c169-b solution with highly sophisticated and reliable anti-jam technology can protect the machine from overloading.<br><br> <strong>have the security you want</strong><br> the machine is enhanced shredding ability with innovative technology to shred up to 14 sheets of paper (letter size, 20lb) into 13/64 x 1-37/64 inches tiny pieces (security level p-3) at a single pass. the shredding speed reaches 1.9m per minute and an 22cm entry slot can accept all letter and legal-sized documents. when shredding small material like envelops or receipts, please insert them through the middle of the feed opening. <br><br> <strong>1-year warranty</strong><br> the warranty of this unit is 12 months from the date of first purchase, provided that the machine has been used appropriately, which ensures the least worries and best experience that we could provide for our dearest customers. note: a few pieces of shredded paper may be found inside the shredder blades or the waste basket due to the 100% full shredding test in the process of manufacturing to ensure quality. if you are not satisfied, please contact customer service for further assistance.