Quantum Trio Qf8n Nikon 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 Nikon’s i-TTL 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. The flash runs on Turbo series battery packs, which can provide a recycle time of just 1.5 seconds at full power. The unit also has a variety of sync settings, including slow, high-speed, 1st and 2nd curtain.