It has SATA3.0 cable inside, so you can easily connect and install the hard disk.
<br />Hard Disk Requirement: 3.5inch SATA port, 500G-3TB capacity.
<br />
<br />Features:
<br />*Consist of 4 channel HD 720P WiFi network video recorder + 4pcs megapixels
<br />infrared waterproof WiFi cameras for CCTV security surveillance system.
<br />*Support both wireless WiFi and wired cable connection.
<br />*More stable transmission effect with enhanced dual WiFi antennas.
<br />*Support android/iOS phone or pad APP control (EseeCloud).
<br />*Support motion detection record and email alarm notification.
<br />
<br />NVR Specifications:
<br />Processor: Hi3520D chip
<br />Operating System: LINUX OS
<br />Menu Display: 1/4 screen
<br />Record Resolution: 1280*720
<br />Record Mode: Manual/Scheduled/Motion
<br />Compression Format: H.264
<br />Sync-playback: 4 channel
<br />OSD Language: English, German, French, Spanish, Portuguese,
<br />Italian, Russian, Japanese, Korean, Chinese, etc
<br />NVR Resolution: 1024*768, 1280*1024, 1440*900, 1080P
<br />HDD Support: 3.5inch SATA port, 500G-3TB capacity
<br />WiFi Protocol: 802.11b/g/n, dual WiFi antennas
<br />Connection Distance: 100m (open), 20m (obstacled)
<br />APP Name: EseeCloud (can download on APP store)
<br />APP OS: support Android/iOS phone or pad
<br />PC CMS: support windows xp, win7, win8, win10 OS
<br />Browser: support IE, Firefox, Chrome, Safari, etc
<br />Network Protocol: HTTP, DHCP, SMTP, PPPOE, FTP, DDNS, 3G
<br />NVR Size: 26*22.3*4.6cm; NVR Weight: 787g
<br />
<br />Camera Specifications:
<br />Image Sensor: 1/4inch CMOS
<br />Pixels: 1.0MP megapixels
<br />Resolution: 1280*720
<br />Focus: 3.6mm fixed Lens
<br />LED: 36PCS IR LEDs; auto switch
<br />Minimum illumination: 0Lux (IR on)
<br />IR Distance: 20-30 meters
<br />Waterproof Grade: IP66
<br />Material: Aluminum alloy
<br />Camera Size: 17.7*6.1*6.5cm
<br />Camera Weight: 369g
<br />
<br />Package List:
<br />1 * 4CH WiFi NVR (not include hard drive)
<br />4 * 720P WiFi Camera
<br />5 *  Adapter
<br />1 * USB Mouse
<br />1 * Network Cable
<br />1 * TF Card (contain software and manual)
<br />4 * Bag of Screws for Camera Mounting
<br />1 * Bag of Screws for HDD Installation
<br />1 * User Manual (English)