Olympus Evolt E-500 Zoom/Bounce & Swivel Head Flash (Guide Number Of 148 Feet 45 m At 85mm) Dedicated flash for Panasonic TTL with vertical bounce of 90 and horizontal swivel of 270, with zoom head (Full Frame) 24-85mm Autofocus auxiliary lamp helps the camera to focus in low-light situations | Exposure control system: TTL autoflash and manual flash Recycle time: Approx.0.1~2.2 seconds Guide No. (1/1 output @105mm): 36(m ISO 100)| Sync Trigger Mode: Hotshoe ,Optic triggering Wireless flash function: Master, slave, off | Controllable slave groups: 3(A,B and C)