 "Canon MR-14EX II Macro Ring Lite - ring-type (macro) flash" Flashes & Accessories CDW.com " Canon flash 9389B002 Lights
"The Macro Ring Lite MR-14EX II is ideal for EOS quality close-up photography when used in conjunction with one of Canon's EF macro lenses. Redesigned as a perfect complement to contemporary digital SLR setups, it is the most advanced macro flash Canon has ever produced. Sophisticated white LED focusing lamps and two forms of modeling lights make for easy and accurate previewing of lighting effects. Infinitely adjustable in any lighting condition with its illuminated dot-matrix LCD, the Macro Ring Lite MR-14EX II has 12 custom functions and supports E-TTL wireless autoflash when linked with one or more Speedlite 600EX-RT flashes. All this in a refined, compact design with shorter recycling times than its predecessor makes the Macro Ring Lite MR-14EX II a reliable, customizable choice." 
 "Canon Speedlite 600EX II-RT"@en II-RT 1177C002 - Studio Depot"@en
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Effective flash range of 2.3 to 77.4'
Exposure compensation of ±3 EV in 1/3 or 1/2 step increments
Light Distribution settings allow for Standard, Guide Number Priority, and Even Coverage
Radio master and slave functionality 
Use in up to 15 flash setups
10 custom Functions and 8 personal Functions 
LCD panel on rear for viewing and changing settings
AF assist beam with range of up to 13.1'
Fresh batteries will provide approximately 180 full-power flashes
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 Compatible Cameras Type-A EOS cameras (E-TTL II/E-TTL autoflash) Type-B EOS cameras (TTL autoflash)  Guide Number Approx. 49.2 ft/15m at ISO 100 Number of Flashes Approx. 100 - 700 flashes Recycling Time Nominal Flash: 0.1 - 5.5 sec Quick Flash: 0.1 - 3.3 sec  Flash Range Effective flash range with EF 50mm f/1.4 lens at iso100 Normal: Approx. 1.56 - 91.2 ft/0.5-27.8m Quick Flash: Approx. 1.6 - 48.6 ft/0.5-14.8m High-Speed Sync: Approx. 1.6-48.2ft/0.5-14.7m  AF Assist Beam Infrared AF-assist beam TTL second image formation phase-difference AF Support 1-65 AF points Phase-difference AF during viewfinder shooting Quick mode during Live View Shooting or movie shooting Effective Range: At center: 2.0 - 32.8 ft/0.6-10m At periphery: 2.0-16.4 ft/0.6-5.0m  Custom Functions 15 Functions 6 Functions  Power Source Four AA-size/LR6 alkaline or AA/HR6 Ni-MH batteries External Power Source Compatible (Compact Battery Pack CP-E4N recommended) Dimensions 3.10 x 5.64 x 4.83 in/78.7 143.2 x 122.7mm Weight Approx. 15.34 oz/435g