Product Highlights : - 2.4 GHz Transceiver with 328' Range - Guide Number: 190' at ISO 100 and 105mm - Zoom Range: 24-105mm (18mm with Panel) - Output Range: 1/1 to 1/128 Spec : - Mount : Shoe - Guide No : 190.29' (58 m) ISO100 at 105 mm position - Exposure Control : Manual - Coverage : 18 mm - 105 mm (Full frame) - Zoom Head : Full frame 24 mm - 105 mm - Off Camera Terminal : PC - Recycle Time : Approximately 3 seconds - Flash Duration : 1/200 - 1/20000 sec - Flash-ready Indicator : Yes - Wireless Operation : - Method: RF - Distance: Up to 328.08' / 100 m - Wireless Communication Channels : 16 Channels - Wireless Groups : 3 Groups - Power Source : 4x AA Alkaline, Rechargeable NiMH Batteries - Dimensions (WxHxD) 2.4 x 7.5 x 3.1\ / 60.0 x 190.0 x 78.0 mm - Packaging Info : Box Dimensions (LxWxH) 8.425 x 3.543 x 3.228 n - Included : - Case Flash - Flash - Stand - Manual Book 1 Year Warranty