Compatibility Work For FCC ID: CWTWB1U819, Frequency: 433MHZ. And compatible with 2011-2012 Forester, 2009-2013 Impreza, 2011-2013 Legacy, 2011-2013 Outback. Please check the original FCCID before purchase. For full complete list, please check our product description and the product appearance. ^^ Notice ProgrammingFree DIY programming instruction will be provided. Please make sure that your original has the same button combination. Also, the FCC ID on your remote must be the same. Your vehicle must be equipped with keyless entry, otherwise this remote will not work. ^^ Tested for Performance All keys include batteries and are electronically tested to ensure they're ready to go before we ship them out, so you know you're getting reliable support. ^^ Features 4 button car key, built-in chip, safe and reliable, sensitive response, signal will not be interfered. Small in size, light in weight, easy to carry, perfect for your car key. Beautiful and delicate