Product details:

Includes the following: Canon MR-14 EX Macro Ringlite Flash Lens Cap Case Features: Guide No. 46' / 34' at ISO 100 Twin-Tube Design LED Focusing Lamps E-TTL Support 12 Custom Functions Specifications: Type: Flash Mount: Shoe Guide No: 14m (ISO100) 10.5m (ISO100) Effective Range: 5m (f/2.8 @ ISO 100) 2.7m (f/2.8 @ ISO 100) Modeling Light: Yes Angle of Coverage: 80° Horizontal, 80° Vertical Vari-Power Manual: 1/1 - 1/128 TTL Dedication: Yes Recycle Time Approximately 0.1 - 5.5 seconds Flash-ready Indicator: Yes Filter Thread: 67mm Display: Yes, (backlit) Power Source: 4x AA Alkaline, Lithium, NiCad, Rechargeable Ni-MH Batteries Ring Dimensions: 12.96cm x 11.21cm x 2.53cm Power Unit Dimensions: 6.96cm x 11.88cm x 7.14cm Weight: 455g (Excluding Batteries) The Canon MR-14 EX Macro Ringlite Flash is designed for use with Canon macro lenses for close-up photography. With a guide number 34' at ISO 100 per side, its twin tube design allows each flash tube to fire independently, or simultaneously to provide a combined guide number of 46' at ISO 100. White LED focusing lamps and two types of modeling lights allow for accurate previewing of the light's effect. An illuminated dot-matrix LCD screen lets you make adjustments to the flash in both bright- and low-light situations. The MR-14EX II has 12 custom functions, and supports wireless E-TTL when linked with one or more Speedlite 600EX-RT flashes. The ring flash can be powered by 4x AA batteries or an optional CP-E4 battery pack. This unit is compatible with the Canon EF 50mm f/2.5 Compact Macro, EF-S 60mm f/2.8 Macro USM, EF 100mm f/2.8 Macro USM, and MP-E 65mm f/2.8 1-5x Macro Photo lenses. If using the EF 100mm f/2.8L Macro IS USM lens, the separate Macrolite Adapter 67 is required; if using the EF 180mm f/3.5L Macro USM lens, the separate Macrolite Adapter 72C is required.