CyberSync Battery Powered Trigger Receiver. The CyberSync transmitter/receiver pair may be used to trigger all Paul C. Buff, Inc. studio flash units as well as most other flash brands employing a standard phone jack or mini phone jack sync input. Connection to flash units using “H” or “PC” style connections is possible with suitable adapter cables. It is generally advisable to use a separate receiver for each flash unit in your system, though it is feasible to use only one receiver connected to one of your flash units and allowing additional flash units to fire via their flash-sensitive trippers.