Take control of both on- and off-camera lighting with the bare-bulb Qflash TRIO Flash from Quantum, which features a built-in FreeXwire radio system for wireless operation from up to 500' away and an output rated at 80 Ws. This version is compatible with Canon's E-TTL / E-TTL II metering system and has a guide number of 105' at ISO 100 with the QF60 reflector, which also provides coverage of about 35mm on a full frame camera. The head can tilt upwards 90° as well as rotate both left and right 180° for full bounce functionality.