1.100%tested 2.warranty:30days 3.best price 4.laptop keyboard for HP 500 HP 580T HP 600 HP 520 HP800 HP530 If you have any questions, please do not hesitate to contact us. OR EMAIL TO US. Shenzhen haotianhong Technology Co., Ltd. Address:duhui20A, duhui100A Building, Huaqiang Center, Futian District,Shenzhen,China TEL : +86-755-83957844