AN-1003 Dimension: 10 x 3 mmfrequency: 2.45GHz & 5~6GHzApplication: WiFi(802.11a,b,g,n) / Other dual band RF module AN-1003 PF-1003-U1 Dimension: 10 x 3 mmfrequency: 2.45GHz & 4~7GHzApplication: 802.1x / UWB /Other wireless RF chip PF-1003-U1