Check the listing for details. 5 PCS AT89S51-24PU DIP-40 8-bit Microcontroller with 4K Bytes Programmable Flash. Condition: New. Listed at 8.99 USD. __Welcome to our Store__ Item Description Parts NO.: AT89S51-24PU Package: DIP-40 Quantity: 5 PCS a lot 8-bit Microcontroller with 4K Bytes In-System Programmable Flash If you buy more quantity, Please contact us Payment Information · We accept Paypal payment only. · Shipping cost cannot be combined. · 1)Economy Int'l Shipping is without a tracking number. 2)If you need a tracking number ,Please choose the Standard Int'l Shipping , use Registered airmail ,have a tracking number . Shipping Information · Items will be ship within 2 days of payment received. · Items ship from Hongkong and it takes 10-20 working days (2-4 weeks) to receive for most area. · If you do not receive item over 30 working days (6 weeks), please contact me to investigate the case. Return Policy · Any problem or unhappy with items. You will get refund in full amount. No question ask. Contact Us · If you have any question, please contact me via ebay contact seller. wish you a happy shopping, welcome to the next visit