2.4 GHz Reduced Interference Frequency | 16 Channels | Range Up to 328" * Built-in Antenna | Receiver is Powered by Camera | Dual-Function Shutter Release Button * Bulb Release Mode | Trigger Confirmation | LED Indicators * Whats In The Box: FreeWave Micro Wireless Transmitter, FreeWave Micro Wireless Receiver, Lanyard, 3AAA Batteries, Soft Pouch, Instruction Manual, Limited 1-Year Warranty