Yongnuo YN560 IV Manual Speedlite

The Yongnuo YN560 IV is the world's best-selling budget manual speedlite. It combines a solid GN58 (ISO 100 · 105mm) output with a built-in 2.4G radio that works as both a transmitter and receiver — control other YN560-series flashes right from the unit, or fire it from a YN560-TX / RF-603 / RF-605 trigger. Guide Number: GN58 (ISO 100 · 105mm) Manual + Multi (stroboscopic) modes Built-in 2.4G radio — transmitter AND receiver S1/S2 optical slave modes Flash coverage: 24–105mm (manual zoom) Recycle time: ~3s at full power Power: 4× AA batteries Universal hot shoe — Canon, Nikon, Sony (via adapter), Fuji, etc.