TRENDnet Wi-Fi Hot Spot Detector 802.11 A/G/B Supports 802.11a/b/g Ad-Hoc (Peer-to-Peer) Mode or Infrastructure (AP-Client) Mode Dynamic Data Rate Scaling at 54, 48, 36, 24, 18, 12, 9, & 6Mbps for 802.11a/g Dynamic Data Rate Scaling at 11, 5.5, 2, & 1Mbps for 802.11b Built-in Rechargeable Lithium Ion Battery (automatically charges when connected to the USB 2.0 port)