Wireless Flash Trigger
Supports up to 16 channels
Transmitter Power Input: 23A 12V battery (included)
Receiver Power Input: 2 AAA batteries (not included)
Long battery life of trigger: one year or over 20,000 continuous triggers
Plug size of receiver: 3.5mm
Adapter size for receiver plug: 3.5mm - 6.35mm
Radio working frequency: 433MHz