The used Olympus FL-600R Flash is a user-friendly consumer flash designed for Micro 4/3 cameras. Key features include:

Standard Flash Zoom Range of 12-42mm. The Olympus FL-600R Flash offers a standard flash zoom range of 12-42mm (35mm equivalent of 24-84mm), as well as a wide panel diffuser that covers 8mm (35mm equivalent of 16mm).

Guide Number of 50 at ISO 200. The FL-600R has a Guide Number of 50 at ISO 200 with a 2.5-second recycle time, making it a great main flash option for Micro 4/3 shooters.

Wireless Triggering. The 90-degree tilt/180-degree swivel articulating head makes bouncing flash simple, and the FL-600R features a built-in commander function that allows you to wirelessly trigger other FL-600Rs or older R-series flashes when the master flash is mounted to a compatible Olympus camera. With up to three groups and four frequency channels, you can prevent interference from other nearby photographers.

Built-In LED. Additionally, the FL-600R features a built-in LED with a range of 1-5m (depending on the lens) that can be used as an autofocus illuminator or continuous video light. It’s powered by four AA batteries (not included) that provide roughly 250 full-power flashes with alkaline batteries, or 370 using NiMH batteries.