The USW-Pro-24-POE 
Is a configurable Gigabit Layer2 and Layer3 switch with auto-sensing 802.3at PoE+ and 802.3bt PoE++. Sixteen PoE+ and eight PoE++ RJ45 ethernet ports have total 400W PoE budget, and two SFP+ ports offer 10Gbps uplink options. Near-silent cooling and a 1.3" touch LCM.
Note: Layer3 will be included in later software release
Near-Silent Cooling: 
The UniFi Pro PoE Switch can be located in any workspace. Its integrated fans have built-in PWM (Power Management) control, air ducts and covers, and temperature sensors for the best user experience.
Fiber Connectivity:
SFP+ ports enable high-capacity uplinks of up to 10 Gbps, so you can directly connect to a high-performance storage server or deploy a long-distance uplink to another switch.
802.3bt PoE++: 
PoE support simplifies your network infrastructure and cabling. Eight ports offer 802.3bt PoE++ to provide up to 64W of power (per port) to your high‑power PoE devices. Remaining ports offer 802.3af/at PoE. 
Redundant Power Option:
The UniFi Pro PoE Switch supports an external DC input interface, the proprietary USP RPS interface, as a redundant power feature for backup if the internal PSU fails.
Features:
- (8) Gigabit RJ45 802.3bt PoE++ ports
 - (16) Gigabit RJ45 802.3at PoE+ ports
 - (2) 10G SFP+ ports
 - Layer 2 and Layer 3 features
 - 400W maximum PoE power
 - 1.3" touchscreen display
 - UniFi SmartPower RPS DC input
Near-silent cooling
 - Managed by UniFi Network Controller
 
QUICK START GUIDE
USW PRO 24 POE GEN2  | 
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Dimensions:  | 442.4 x 285.4 x 43.7 mm (17.42 x 11.24 x 1.72")  | 
Weight: With Rackmount Brackets:  | 4.30 kg (9.48 lb) 4.39 kg (9.68 lb)  | 
Interfaces: Networking: Management:  | (24) 10/100/1000 RJ45 Ports (2) 1/10G SFP+ Ethernet Ports Ethernet In-Band  | 
Power Method Universal Input: USP RPS DC Input:  | 
 
 100-240VAC/50-60 Hz 52VDC, 7.69A; 11.5VDC, 2.61A  | 
Power Supply:  | AC/DC, Internal, 450W  | 
Supported Voltage Range:  | 100 to 240VAC  | 
Max. Power Consumption (Excluding PoE Output):  | 50W  | 
LEDs System: RJ45 Data Ports: SFP Data Ports:  | 
 
 Status PoE; Speed/Link/Activity Link/Activity  | 
ESD/EMP Protection:  | Air: ± 16 kV, Contact: ± 12 kV  | 
Shock and Vibration:  | ETSI300-019-1.4 Standard  | 
Operating Temperature:  | -5 to 40° C (23 to 104° F)  | 
Operating Humidity:  | 10 to 90% Noncondensing  | 
Certifications:  | CE, FCC, IC  | 
SOUND LEVEL*  | 
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25% PoE Load, 25° C Room Temperature:  |  0.9 dBr
  | 
50% PoE Load, 25° C Room Temperature:  | 7.3 dBr  | 
100% PoE Load, 40° C:  | 18.8 dBr  | 
POE  | 
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PoE Interfaces Ports 1-16: Ports 17-24:  | 
 
 POE+ IEEE 802.3af/at, (pins 1, 2+; 3, 6-) 60W PoE++ IEEE 802.3bt, (Pair A 1, 2+; 3, 6-) (Pair B 4 , 5+; 7, 8-)  | 
Max. PoE Wattage per Port by PSE 802.3at: 802.3bt:  | 
 
 32W 64W  | 
Voltage Range 802.3af Mode:  | 44-57V  | 
Voltage Range 802.3at Mode:  | 50-57V  | 
*Background noise level: 27.5 dBa