Sync-Focus IR Bullet Cameras 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. OSD Sync-Focus IR Bullet Cameras are also capable for OSD Function, Day & Night Surveillance, and with Double Glass Design, which is suitable for many places as store, on the stree, bank, or any security means. Detail Features: 1. Sync-Focus Function: OSD-R, OSD-RS485: make clear image while focusing the objects. 2. Built-in 4-9mm Zoom Lens: Mximize the range of visibility. 3. Built-in 5-15mm, 8-20mm Zoom Lens: optional for buyers. 4. Built-in 30IR 8φ LEDs: High quality in night surveillance with 30IR 8φ LEDs. (Normal cameras are built-in 5φ LEDs) 5. Zoom Function by Remote Control: Users can control the lens easily with remote or key-pad. 6. Support RS-485 7. OSD Menu: Buyers can adjust cameras’ parameter and color easily without extra cost for labors. 8. Video Output Deul Port (Optional): BNC/ Blun (Blun:extend to 600 meters.): Buyers can choose either one or both. 9. 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.