Compatible: EOS-1Ds Mark II, 1Ds, 1D Mark II N, 1D Mark II, 1D, 5D, 30D, 20D, 10D, Digital Rebel XTi, Digital Rebel XT, Digital Rebel (For Mac/Windows; See PowerShot accessories for additional compatibility)
Spec: 1 x 4-pin Type B Male - USB Connector
1 x 4-pin Type A Male - USB Connector
Specifications: Type: Ring Lite, twin circular flash tubes, and separate Controller Unit
Flash Control System:
Control in E-TTL Mode: FP Sync, FE lock, Flash +/- compensation, Flash Exposure Bracketing
Control in Manual Mode: Flash +/- compensation
Ratio Control in Manual: L:R tubes (A:B); 8:1 - 1:1 - 1:8 in 1/2-stop increments
Custom Functions: Twelve (in addition to any on camera), set on flash LCD; three Personal Functions
External Power Source: Compact Battery Pack CP-E4
Guide Number: 45.93' (14 m) ISO100
34.45' (10.5 m) ISO100
Recycling Time: Approximately 0.1 - 5.5 seconds
Power Source: 4 AA batteries in Controller (Alkaline, NiCd, Lithium and Ni-MH type AAs are OK)
Compatible: EOS Rebel T1i EF-S 18-55mm IS
G11, S90, SX200 IS, SX120 IS, SX110 IS, D10, SD3500 IS, SD990 IS, SD970 IS, SD890 IS, SD790 IS, SD880 IS, SD980 IS, SD960 IS, SD940 IS, SD780 IS, SD1400 IS, SD1300 IS, SD1200 IS, SD770 IS, A3100 IS, A3000 IS, A2100 IS, A2000 IS, A1100 IS, A1000 IS, E1