The Hahnel Viper TTL Receiver Canon features Digital Channel Matching (DCM) technology for wireless connection with flashes. It supports connecting an unlimited number of receivers to a Viper transmitter.

• Range: up to 100 m
• microUSB port: for software updates
• 2.5 mm port: for connection to studio flash
• Compatibility: authentic flashes
• Power supply: two AA batteries, included