Seagate 4TB 3.5' SkyHawk 256MB SATA3 Surveillance Optimized, NVR Ready, ImagePerfect, RVS HDD (ST4000VX016) ITX With Power Supply 2) Yealink (T4X/T5X)/Avaya/Poly/Snom/Grandstream/Fanvil desktop phone

2) Yealink (T4X/T5X)/Avaya/Poly/Snom/Grandstream/Fanvil desktop phone without remote control feature

WATER COOLING TUBE MATERIAL Black Rubber

RAID (0/1) Supported

Yealink Protective Case for the W53H

Seagate 4TB 3.5' SkyHawk 256MB SATA3 Surveillance Optimized, NVR Ready, ImagePerfect, RVS HDD (ST4000VX016) ITX With Power Supply 2) Yealink (T4X/T5X)/Avaya/Poly/Snom/Grandstream/Fanvil desktop phoneSeagate 4TB SkyHawk Surveillance HDD, SATA III, 256MB, Surveillance Optimized, NVR Ready Design, ImagePerfect Firmware, Rotational Vibration Sensors Specifications: HDD size: 3. 5 HDD capacity: 4000 GB Interface: Serial ATA III Type: HDD Component for: PC Storage drive buffer size: 256 MB HDD interface transfer rate: 6 Gbit s HDD sustained transfer rate: 180 MiB s 24 7 operation: Yes RV sensor(s): Yes Maximum number of cameras supported: 64 Start stop