ZB means live broadcast, so ZB series is also called Live Broadcast Series. This series is a smart combination of 3 components: tripod stand,selfie stick and universal ball head.3 components lead to 3 combinations:ZB-255-1/2/3. ZB-255-1 is the combination of stick and ball head, so it’s a selfie stick with 360º rotatable head. ZB-255-2 is the combination of tripod stand and universal ball head, so it’s a tabletop tripod. ZB-255-3 is the combination of all the 3 components and we call it live broadcast tripod, it has both function of ZB-255-1 and ZB-255-2 because the components can be freely combined.ZB series products are made of aluminum alloy with high quality and long lifetime.