Comparisons

	Reef Angel (RA)	Reef Angel Plus (RA+)	Reef Angel Star (RA*)
Processor	ATMega328P	ATMega2560	ATMega2560
Flash memory	32K	256K	256K
Screen	128 x 128 color LCD	128 x 128 color LCD	2.8” diag LCD
Additional memory	64K EEprom (2 x 32K banks)	64K EEprom (2 x 32K banks)	micro SD card (256K included)
Real time clock	Yes	Yes	Yes
Clock Battery Backup	Yes	Yes	Yes
Menu control	Joystick w/center push	Joystick w/center push	Touch screen
PH monitoring	Yes	Yes	Yes
Temp prob ports	3	3	3
Float switch ports	2	2	2
Alarm port	No	No	Yes
Serial TTL port	Yes	Yes	No
Independently Configurable Output ports (PWM 0-5VDC or 0-10VDC/Analog 0-5VDC or 0-10VDC)	0	0	4
Analog output 0-10VDC	Yes - Relay Box	Yes - Relay Box	Yes - On board Output ports
PWM output 0-10VDC	Yes - Relay Box	Yes - Relay Box	Yes - On board Output ports
Expansion ports	1	1	2
Ethernet port	No	No	Yes
Cloud server compatible	No	No	Yes
Remote firmware update	No	No	Yes
Head Unit Dimensions	5.00” x 3.80” x 1.50”	5.00” x 3.80” x 1.5”	7.00” x 3.00” x 1.00”
Relay Box	Standard	Standard	Universal Expansion
Relay Box outlets	3 prong USA - Adapter available	3 prong USA - Adapter available	3 Prong Universal
Relay Box A/C input	85-265VAC	85-265VAC	85-265VAC
Relay Box Max Load	10A	10A	10A
Relay Box Max Load per Outlet	5A	5A	5A
Relay Box Dimensions	7.62” x 4.62” x 2.25”	7.62” x 4.62” x 2.25”	7.62” x 4.62” x 2.25”