8 Channels,you can control specific unit or serveal flash units at the same time.Receiver units have a maxium range of 200m, max sync speed of 1/250s.8 different channels let you trigger only chosen specific receivers, or an "all channels" button will trigger all receivers simultaneously.The rotating Transmitter can be used upright or in the low-profile down position. 2.4 GHz frequency provides reduced radio interference and an extended range without the need for line-of-sight alignment as the radio waves will pass through some walls, windows, and floors. Compatible with Canon SpeedLite: 600EXII-RT, 600EX, 580EX II, 580EX, 550EX, 540EZ, 520EZ, 430EX, 430EZ, 420EX, 420EZ, 380EX;for Nikon SpeedLight SB-900,SB-910,SB-800, SB-600, SB-28, SB-27, SB-26, SB-25, SB-24. for Olympus FL-50R, FL36R; for Pentax AF-540 FGZ, AF-360 FGZ, AF-400 FT, AF-240 FT AODELAN FT-8 Transmitter work with all cameras with stand hot shoe mount and cameras with 3.5mm port.It also features a ¼" tripod thread for connecting your flash to a light stand or any device with a ¼" mounting screw.An included 3.5 to 3.5mm sync cable connects the trigger to a studio flash. A 3.5mm to PC plug adapter is also included for flashes with a 1/4" mono plug socket. Parcel includes: Transmitter x 1, Receiver x 1, 3.5 to 3.5mm sync cable x 1, 3.5mm to PC plug cable x 1, 1/4" mono plug socket x 1, Lanyards x2, Carrying pouch x 1 Description:
AODELAN FT-8 Wireless Flash Trigger is a simple and reliable radio flash trigger .It offers a simple way to use off-camea flash .The rotating Transmitter can be used upright or in the low-profile down position.The 8-channel transmitter and receiver units have a maxium range of 200m and feature a "fire-all"channel function.

Dimensions:
Transmitter: 1.4 x 2.0 x 4.1" (3.5 x 5.0 x 10.4 cm),
Receiver: 1.5 x 2.0 x 3.5" (4.0 x 5.0 x 8.8 cm)

Connecting a flash to the FT-8 Receiver hot shoe
1.Turn off the flash and the FT-8 receiver.
2.Slide the flash into the receiver's hot shoe mount .
3.Lock the flash with the flash's locking mechanism.
4.Turn on the flash and the FT-8 receiver.
5.Set the flash to Manual mode.

Connecting a flash/strobe to the FT-8 receiver by sync cable
1.turn off the flash/strobe and the FT-8 receiver.
2.Connect a cable to the receiver's 3.5mm Sync Port.
3.Connect the opposite end of the cable to a flash or studio strobe(a 6.3mm adapter is included for studio strodes with larger ports).
4.Set the flash/strobe to Manual mode.