Vello FreeWave Fusion Wireless Flash Trigger & Remote Control for Sony SLR 2.4GHz Reduced Interference Frequency | Range Up to 320' (100 m) Individual/Group Wireless Flash Trigger | Up to 3 Light Groups/7 Group Combinations Flash Sync Speed of Up to 1/200 sec | Dual-Function Shutter Release Button LED Indicators Whats In The Box: Wireless Transmitter, Studio Trigger Cable (2.5mm Sub-Mini to 1/4" Phono), Studio Trigger Adapter (3.5mm Mini), 2AAA Batteries, Limited 1-year Warranty