Wifi/WLAN/Wireless Network Signal Detector Keychain
Detects 2.4Ghz Wireless LAN networks nearby (802.11b 802.11g and 802.11n) - Standalone operation no more pulling out and boot your laptop or PDA just to find out whether there is a wireless network or hot spot around you - Detects both open and encrypted networks - Displays signal strengths via LEDs - Powered by 2 x CR2032 button batteries (included) . - Note that the batteries are provided by the manufacturer for free. Although most of the included free batteries are fresh batteries in some units may be less "energetic" than that in other units.