• GN 66m (ISO 100 / 200mm)
• Flash Mode - M / Multi
• Manual Flash - 1/128 - 1/1 output control (1/3rd increments)
• 20 - 200mm Manual Flash Zoom

• Built-in Radio Master Modes - YN-560 / RF-603 (2.4GHz RF Systems).
• Built-in Radio Slave Modes - YN-560 / RF-603, and RF-602 (2.4GHz RF Systems).

• Supports 6 Flash Groups
• Supports 16 Channels

• Full Power Recycle - From 3 Seconds
• S1 & S2 Optic Slave Modes
• Custom Functions
• Auto Save Settings
• Sound Prompt
• Heat Protection

• Large LCD Screen
• 360 Degree Swivel and Tilt Head
• Fast Clamping Metal Foot

• External HV Battery Port
• PC Sync Por

YN660 RADIO MASTER FUNCTIONS

USING SLAVE FLASH - YN660 / YN560 IV / YN-560 III

• Remote Flash Power - 1/128 - 1/1 (1/3rd increments)
• Remote Flash Zoom 20-200mm - (Manual Only)
• Group Control - 6 Groups

 

USING RECEIVER - RF-605 

• Fire the Flash
• Group Control (?)

 

USING RECEIVER - RF-603 II / RF-603 

• Fire the Flash Only

The YN660 are basic manual only speedlites when used on camera. Though their main features / functions are the remote manual Radio Master and Slave modes.

 

 

 

 

 

With the YN560-TX tranmitter, and YN560 IV / YN660 flashes providing the most functionality, including Remote Manual Power and Flash Head Zoom Control.