does this power strip have mounting holes on its underside?

Yes it does. It has two of them on one side of the power strip.

Are the USB ports 2.1 amps per port or 2.1 amps combined?

Its two USB charge ports have 2.1 Amp shared—2.1 Amp combined/total not 4.2 Amp.

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CyberPower CSP604U 4 Feet 6 Outlets 1200 Joules Surge Protector with 2 USB Charging Ports (2.1A)

(4) Write a Review

Six NEMA 5-15P outlets support standard power cords
Two additional USB ports allow easy connection for charging mobile devices
4-ft power cord provides additional extension to wall outlets
Filters out both EMI and RFI for cleaner audio and picture quality
Auto shutdown blocks power to devices until you do a manual reset

Choking Hazard Small parts. Not for children under 3 years.

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PROTECTOR 2-2.1A USB 6 OUT 4FT CORD 1200J $50K CEG. Plain Brown Boxes

Model
Brand	CyberPower
Series	Professional
Model	CSP604U

Details
Outlets	6
Outlets Type	NEMA 5-15R
Cord Length	4 Feet
Input Voltage	125V
Input Connections	NEMA 5-15P
Maximum Spike Amperage	60000A
AC Suppression Joule Rating	1200 Joules
EMI/RFI Noise Filter	150 KHz to 100 MHz Up to 32dB
Clamping Voltage	400 V
Protection Modes	L-N, L-G and N-G
Certifications	UL1363 / UL1449 3rd Edition, cUL, RoHS
Color	Black

Features
Features	6 Surge Protected Outlets 1200 Joules of Surge Protection 2 x USB Charging Ports - 2.1A 4 Feet Cord MOV Surge Protection 15A Circuit Breaker EMI / RFI Noise Filters

Dimensions & Weight
Unit Dimensions	1.48" x 2.20" x 11.57"
Unit Weight	1.15 lbs.

Additional Information
First Listed on Newegg	October 23, 2025

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CyberPower CSP604U 4 Feet 6 Outlets 1200 Joules Surge Protector with 2 USB Charging Ports (2.1A)

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Item#: 9SIA8HFKNU3176

Meet Your Seller

CyberPower CSP604U 4 Feet 6 Outlets 1200 Joules Surge Protector with 2 USB Charging Ports (2.1A)

Learn more about the CyberPower CSP604U

Customer Reviews of the CyberPower CSP604U

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info