Flash Equipment YN-04II

• Tx, Rx both designed with Hot Shoe
• Easy to trigger two speed lite by using ONE pair of YN-04II
• Work on both on-camera speedlite and studio flash light
• 4 channels selectable
• Sync speed 1/250S
• Transmitter power: 23A 12V battery
• Receiver power: CR2 battery
• Maximum working distance: 30m (open area, without interference)
• Working frequency: 433MHz

Comes with PC sync port

manual:
http://yongnuo.com.cn/usermanual/pdf/yn042y.pdf