Nikon WT-4a Wireless Transmitter

Transmission Range: Transmission range when wireless LAN is used is approx. 590 feet (IEEE 802.11b/g) or 850 feet (IEEE 802.11a). (Varies according to transmission conditions.) Power Requirements:: EN-EL3e Battery (sold separately) and MH-18a Charger for EN-EL3e battery or AC Adapter EH-6 (sold separately) WiFi Support: Supports wireless LAN conforming to IEEE 802.11b/g, IEEE 802.11a (WiFi a/b/g), and wired LAN conforming to IEEE 802.3u (100BASE-TX) and IEEE 802.3 (10BASE-T)