PROMASTER Unplugged TTL Transmitter for Canon

• ETTL mode with exposure compensation
• Multi flash mode
• High speed sync.
• Manual mode
• 15 Channels with 99 IDs
• A, B, and C Groups with ratio control
• Modeling light control (on/off & intensity)
• AF assist beam (on and off)
• Control of lights's audible function (on and off)
• 300' / 100 m range
• USB firmware upgradeable

Availability of some features is camera-model dependent