That should be find. Just keep in mind that a lot of these chargers they are overrating the output. The 2.1 amp may be the total and not the per port output. But in either case is should work just fine. (if you plug one item in the 2.1 amps will be available to it. If you plug two items in only one amp will be available to each port in both cases you still get all the charging current you need)
A quick search found this...
CSP604U
Tech Specs
- Surge suppression - 1200 Joules
- Circuit breaker - 15 Amp
- Outlets - 6 outlets
- Plug type - NEMA 5-15P (45° off-set)
- Power cord - 4 ft.
- USB charge ports - 2 x (2.1A shared)
So the ports are shared 2.1a. I recently got an Anker PowerBot PB5000 5 port usb charging box. It shares up to 8a max across the 5 ports and has IQ ports (adjusts accordingly to each device plugged in automatically). It was inexpensive ($12) and better than most USB charging boxes that cost 4x more.
Remember that the USB cables are also important. Some won't pass more than 500ma.
The DNA200's max charging is 1a.