Is there a copy of the instructions online? I have lost my copy.

Just press the SET button and the arrow keys to change the parameters. You really can't go wrong with a little push of the buttons. I have not used the instructions for over two years without a problem. But, you can always do a google search on AOYE AV-021. Hope that gives you some encouragement. We've got many months of countdown bliss for many months. 17 days until Christmas!

Can it be set to automatically restart at a specific time (e.g., 30 minutes) once it hits zero?

sorry, it can not re-start again when hit zero. Please check this one https://www.amazon.com/dp/B079G4RRD8 it will re-start again when hit zero. And it will be in stock tomorrow

Can it work with 220v? Can it work on batteries?

Yes it can work with 220V or 110V.You can buy an external 5V battery to power up

Does the power cord plug into the back or the side?

the side. you can buy a power bank to work without wall adapter

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LED Countdown Clock Safety Event Timer with Remote and Buttons for 1.8'' 9 Digits

LED Countdown Clock Safety Event Timer with Remote and Buttons for 1.8'' 9 Digits

Product ID: 663872494

Details

Brand
BTBSIGN
Color
Red
Item Weight
1.52 Kilograms
Material
Plastic
Product Dimensions
19.2"D x x 5"H

⏳1000-day countdown/up range

📡Remote control with 2xAAA batteries

🔴1.8'' bright red LED digits

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€ 164.42

Duties & taxes included

In stock

Sold byAmazon GERMANYDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⏰ Countdown in Style, Lead with Precision!

BOLD BRILLIANT DISPLAY - 1.8-inch high red LED digits ensure visibility from across the room—never miss a moment.
MULTI MODE FUNCTIONALITY - Switch easily between countdown, count-up, 12/24-hour clock, and stopwatch modes for ultimate flexibility.
VERSATILE MOUNTING OPTIONS - Wall mount or desk placement adapts to your workspace or event environment effortlessly.
SEAMLESS CONTROL AT YOUR FINGERTIPS - Remote operation lets you adjust settings without leaving your desk or stage.
MASTER YOUR TIME OWN YOUR DEADLINES - Track projects or events with precision up to 999 days, hours, minutes, and seconds.

The BTBSIGN LED Countdown Clock features a vivid 1.8-inch red LED display with 9 digits, capable of counting up or down up to 999 days, hours, minutes, and seconds. Designed for professional and event use, it offers multi-function modes including 12/24-hour time and stopwatch, controlled conveniently via remote. Its versatile mounting options and clear visibility make it ideal for tracking deadlines, special occasions, or project milestones with confidence.

Specifications

ASIN	B07HFF8HK4
Best Sellers Rank	#320,282 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #2,129 in Clocks (Home & Kitchen)
Brand Name	BTBSIGN
Color	Red
Customer Reviews	4.3 4.3 out of 5 stars (284)
Item Dimensions D x W x H	19.2"D x 19.2"W x 5"H
Item Weight	1.52 Kilograms
Manufacturer	BTB SIGN CO., LTD
Manufacturer Part Number	B01CBN3BKE
Manufacturer Warranty Description	Two years warranty; if the item is defective as you receive, please notify us within 7days of arrival. All items must be returned in their original condition in order to qualify for refund our exchange of goods.
Material Type	Plastic
Model Number	BI-9D-1.8
Number of settings	4
Screen Size	9 Inches
UPC	738770817527 612032523800
Unit Count	1.0 Count

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