With a built-in YN-622N radio transceiver, the YN685 Wireless TTL Speedlite from Yongnuo offers complete radio slave functionality with both the YN-622N and RF-603/YN-560 radio systems for maximum compatibility with your existing gear. The flash is also compatible with Nikon's i-TTL flash system when mounted to the camera and has a powerful guide number of 197' at ISO 100 and 200mm. Benefiting this power is a wide zoom range which will cover 20-200mm in full frame, and a diffuser for wide angle lenses. It also features full bounce with tilt up to 90° and rotation of 180° to the left or right.