Nikon Wireless Remote Controller WR-10 [Japan Import] Supported Cameras: SLR camera equipped with a 10-pin terminal or accessories Terminal WR-T10 Power: CR2032 type 3V lithium battery (one use) Wireless number of channels: 5ch (2.425GHz), 10ch (2.450GHz) Pairing possible number of devices: Up to 64 Communication distance (outlook) 2: WR-R10, about 20m between WR-T10 (the case of ground height about 1.2m)