AHD speeddomes are HD and FHD security camera ´ s, these are with utp or coax cable connected. Most AHD movable security camera ´ s have no separate rs485 cable more necessary, operate and sending a speeddome can so directly via the coax cable itself. This is also called coaxial telemetry. Advantage of a ptz camera ahd is the fact that these remotely via a laptop or smartphone to operate. A ptz security camera can move left, right, up and down, but also in and out. There are several models with optical zoom, the more zoom, the more one can look, some examples are, 3 x, 12, 22, 32 x zoom. A movable ahd ptz camera is useful for companies with a guard in service, which can zoom in at any emergencies clearly and thus directly see what exactly is going on. A movable ahd ptz security camera is not so cheap, but on the other hand, it is also not wise to the cheapest ptz ahd to sell security camera ´ s. Because there are many moving parts, this reliable, especially when all the cheap HD movable ptz domes. Our ptz systems may be slightly more expensive than at another online store, but we guarantee good quality and otherwise we take accountability, where other companies behind rules shelter!