BIG Helios flash trigger set 2.4G Studio 4 (428612)
With up to 100 meters range you bridge so large distances. Through radio, no line of sight is needed as with infrared. And with 16 programmable channels a lot of devices can be operated in parallel without interfering with each other. An additional setting on the transmitter allows the simultaneous triggering of all recipients. Also the mixing of transmitters and receivers is possible at any time.
Power source: 23A battery (transmitter), 2×AAA LR03 (receiver)