YONGNUO YN320EX TTL Flash Speedlite For Sony (Black) Features 1. GN31 ISO100, 105mm 2. High-speed Sync TTL Speedlite 3. Wireless transmitter-receiver, supports optical triggering and 2.4GHz radio triggering. 4. Realize 6-group flash control easily 5. Ultra-fast Charging Recycle System 6. Firmware Upgrade 7. Sound Prompt System 8. Flash Head Electric Zoom 9. Compatible with Sony 7M2 7M3 7R2 7R3 7R4 7C A6000 A6300 A6400 A6500 A6600 etc. Specifications 1. Product Model: YN320EX 2. Circuit design: Insulated Gate Bipolar Transistor (IGBT) 3. Guide No.: 36 (ISO 100, 105mm) 4. Flash mode: TTL, M, Multi 5. Trigger Mode: On-camera,2.4GHz radio trigger,wireless optical trigger 6. Zoom range: 24, 50, 70, 105mm 7. Vertical rotation angle: -7-90 degree 8. Horizontal rotation angle: 0-270 degree 9. Power supply: 4xAA Alkaline battery or AA NI-MH battery (not included) 10. Light-emitting times: Approx.220 times (with 1900mA NI-MH battery) 11. Recycle time: Approx.2s (with AA NI-MH battery) 12. Color temperature: 5600k 13. Flash time: 1350s-120000s 14. Flash control: 8 levels of output control(1128~11), 22 levels of fine tuning in total 15. External interface: Hot shoe, Micro USB port, Wireless trigger distance: 20-25 indoors,10-15 outdoors for photosensitive triggering; Up to 100m for radio triggering. 16. Dimensions: 40x65x154mm 17. Net Weight: 225g