DT401 - Calculator AURORA - Free user manual and instructions

Product Type	Desktop Calculator
Model	Aurora DT401
Display	8-digit LCD
Power Source	Dual power: Solar cell and 1x LR54 button cell
Dimensions (W x D x H)	150 x 100 x 25 mm
Weight	100 g (including battery)
Basic Operations	Addition, subtraction, multiplication, division
Additional Functions	Percentage, square root, sign change, memory keys
Memory	3-key memory: M+, M-, MR/CM
Key Material	Plastic with tactile feedback
Housing Material	ABS plastic
Auto Power Off	Yes, after approximately 5 minutes of inactivity
Operating Temperature	0°C to 40°C
Acoustic Level	Silent operation (no audible beeps)
Pieces and Repairability	Battery user-replaceable; no other serviceable parts
Cleaning	Wipe with a soft, dry cloth. Do not use solvents.
Safety	Do not expose to water or extreme temperatures. Keep away from children under 3 years due to small parts.
Warranty	2 years from date of purchase

Frequently Asked Questions - DT401 AURORA

How do I turn on the Aurora DT401 calculator?

The calculator turns on automatically when you press any key. If it doesn't, check the battery or expose the solar panel to light.

What type of battery does the DT401 use?

It uses a 1x LR54 (AG10) button cell battery. The calculator also features a solar panel for supplemental power.

How do I replace the battery?

Slide the battery cover off the back, remove the old battery, and insert a new LR54 with the positive side up. Replace the cover.

How do I clean the calculator?

Use a soft, dry cloth to wipe the surface. Do not use water, chemicals, or abrasive cleaners.

What does the MR/CM key do?

Press MR once to recall the stored memory value. Press MR twice to clear the memory.

How do I calculate a percentage?

Enter the number, press the multiplication key, enter the percentage value, then press the % key. The result is displayed.

Why does the display show 'E' or 'Error'?

This indicates an overflow or division by zero. Press the 'C' clear key to reset.

Can I use the calculator in direct sunlight?

Yes, it works well in bright light due to the solar panel. Avoid extreme heat to prevent damage.

Is the Aurora DT401 suitable for students?

Yes, it is a basic calculator ideal for everyday arithmetic at home, school, or office.

What should I do if the display is dim?

Ensure the solar panel is exposed to enough light or that the battery is fresh. If the problem persists, contact support.

USER MANUAL DT401 AURORA

SWITCH	PROBLEM	INPUT	DISPLAY
F	Set currency rate=12	ONC1 2SET	0.12.12.
F	Exchange 4235(€)=?(€)	4 2 3 5€	4235.€ 352.92
F	Exchange 4567(€)=?(€)	4 5 6 7€	4567.54804.00
F	Currency rate review	ONCSET €	0.12.
F	2+6-7=	ONC2 + 6 - 7 =	0.1.
5/4 A	0.02+0.03-0.01=	2 + 3 - 1 =	0.04
↑ 4	-2.7×9÷7=	2 · 7 ✘ X 9 ÷ 7 =	-3.4715
↓ 3	4 × (5+6)÷3=	5 + 6 X 4 ÷ 3 =	14.666
F	2÷3=	2 ÷ 4 CE 3 =	0.66666666666
F	BACKSPACE	→→→	0.666666666
↓ 0	2.2+3=	2 · 2 + 3 =	5.
	4.6+3=	4 · 6 =	7.
5/4 2	2.465 - 5.73=	2 · 4 6 5 - 5 · 7 3 =	-3.27
	9.7 - 5.73=	9 · 7 =	3.97
↑ A	2.7 × 1.26=	2 · 7 X 1 · 2 6 =	3.41
	2.7 × 3.27=	3 · 2 7 =	8.83
5/4 4	7÷6=	7 ÷ 6 =	1.1667
	8÷6=	8 =	1.3333
F	2+3+3=	2 + 3 = =	8.
	6-2-2=	6 - 2 = =	2.
	22=	2 X = =	8.
	1÷5÷5=	5 ÷ = =	0.04
F	20×25%=	2 0 X 2 5 %	5.
	5÷20%=	5 ÷ 2 0 %	25.
	20×(1+15%)=	2 0 + 1 5 %	23.
	20×(1-20%)=	2 0 - 2 0 %	16.
F	100÷(1-20%)=	1 0 0 ÷ 2 0 MU	125.
	100÷(1-20%)-100=	1 0 0 ÷ 2 0 MU	25.
F	2×3=6	2 X 3 M+	M 6.
	-) 3×4=12	3 X 4 M-	M 12.
	+) 4×5=20	4 X 5 M+	M 20.
	14	MR	M 14.
		MC	14.