OSD Sync-Focus Vandal-Proof IR Domes, besides all the function of ZVIDs are capable, are designed with zoom function which could be comtroled by remote or key-pad. Sync-Focus function allows the camera to stay clear image when focusing the objects, while auto-focus would blur for few seconds, which might loose the key moment when the crimes took place. SFVIDs are suitable for many places as convinient store, department, jewlry shop, on the stree, bank, or any security means, etc. Detail Features: 1. Sync-Focus Function：OSD-R,OSD-RS485 2. Built-in 4-9mm Zoom Lens: Mximize the range of visibility. 3. Built-in 42IR LEDs: Extreme highly qualified for clear night surveillance ability even in far distance. 4. Zoom Function by Remote Control: Users can control the lens easily with remote or key-pad. 5. Support RS-485(Optional) 6. OSD Menu: labour-saving for parameter adjustment. 7. Video Output Deul Port (Optional): BNC/ Blun (Blun:extend to 600 meters.): Buyers can choose either one or both. 8. Working Voltage Range DC12~18V: Normal cameras are only capable for DC 12~15V, but we maximize it till 18V which extend the cameras’ usetime by adjusting the unstability of the electric voltage. 9. Material: Zinc Alloy: Extremly strong and supperior in vandal-proofing to other matal alloy. 10. Double Glass Design: Block out the influence of the infrared ray while recording.