Model Number: YN460II -2015 Brand Name: YongNuo Key Specifications/Special Features: Guide number: 38 (at 35mm focal length, ISO 100 in meters)53 (at 35mm focal length, ISO 200 in meters)Flash mode: M, S1, S2Power ratio: full, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/7Number of flashes: approximately 100-1500, with fresh AA size alkaline batteries

Recycling time: approximately 0.1-5s, with fresh AA size alkaline batteries

Bounce flash:
Vertical: up to 90°
Horizontal: left 180°, right 90°

Flash speed: 1/800s-1/20000s

Color temperature: 5600K

Slave mode S: normal optic slave

Slave mode S2: pre-flash cancel slave

Power source: 4pcs AA-size battery - alkaline, lithium, or rechargeable NiMH usable

Power saving: 30mins to power off, or 60mins to power off on the optical slave mode

Dimensions: 72*135*85mm

Net weight: 250g