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More from ProtoArc →EM04 Wireless Trackball Mouse
$26.99$35.99Save 25%
In stock at protoarc.com
ProtoArc's EM04 is a thumb-operated trackball mouse, so the body stays still while your thumb moves the cursor. It pairs with up to three devices over Bluetooth and a 2.4GHz receiver, offers five DPI steps from 200 to 1600, and runs on a 450mAh rechargeable battery. It suits cramped desks and people trying to reduce wrist movement.
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Highlights
- Thumb-controlled trackball, no sliding required
- Bluetooth and 2.4GHz receiver, up to 3 devices
- Five DPI levels: 200, 400, 800, 1200, 1600
- 450mAh rechargeable battery with low-battery light, up to 1 month standby
- Includes USB receiver, Type-C cable, and manual
Best for
People with small or cluttered desks who want cursor control without moving their arm.
Things to consider
- Buttons are not programmable, and the forward and back buttons do not work on macOS.
- Trackballs take an adjustment period for first-time users.
- Top DPI of 1600 is modest for high-resolution or multi-monitor setups.
Key specs
| Price | $26.99 |
|---|---|
| Connection | Bluetooth + 2.4GHz, 3 devices |
| DPI | 200 / 400 / 800 / 1200 / 1600 |
| Battery | 450mAh rechargeable |
| Charging | USB Type-C |
| Colors | Black, Purple, Silver, Red |
Our take
An inexpensive way to try a thumb trackball with modern multi-device features. Mac users who rely on side buttons should look elsewhere.
Why it makes a good gift
A wireless thumb trackball mouse that keeps the hand still while working, easier on wrists during long days.
EM04 Wireless Trackball Mouse at a glance
| Brand | ProtoArc |
|---|---|
| Price | $26.99 (was $35.99) |
| Type | Mice |
| Options | 4 colors |
| Availability | In stock at protoarc.com |
| Coupon | GFPALEKSANDRBODNAR |
| Returns | Returns within 30 days of delivery get a full refund including original shipping and… |
Price check
At $26.99, the EM04 Wireless Trackball Mouse is one of ProtoArc's more affordable items, whose 110 listed products run $9.90 to $292.95.
It's currently 25% below its listed price of $35.99. Sale prices can end without notice, so check the live price before you order.
Similar items from other brands we track run $49.99 to $99.99.
Frequently asked questions
Does the EM04 work on a Mac?
Yes, it works with macOS, though the forward and back buttons are not supported there.
Can I program the buttons?
No. ProtoArc says the buttons are not programmable.
How long does the battery last?
ProtoArc quotes up to a month of standby on a full charge.
Is the EM04 Wireless Trackball Mouse on sale?
Yes. ProtoArc lists it at $26.99, down from $35.99 (25% off). Sale prices change, so confirm the live price on protoarc.com.
Is there a coupon code for the EM04 Wireless Trackball Mouse?
ProtoArc's store-wide code GFPALEKSANDRBODNAR can be entered at checkout on protoarc.com. ProtoArc sets the discount, and some items or sale prices may be excluded.
What is ProtoArc's return policy?
Returns within 30 days of delivery get a full refund including original shipping and handling fees. ProtoArc provides a prepaid label for defective or incorrect items; change-of-mind returns ship at the customer's cost, and an RMA number is required.
How long does ProtoArc take to ship?
Continental US orders ship free over $19.99 with an estimated 3 to 5 business days. Canada is quoted at 5 to 7 business days, and the UK, Germany and select EU countries pay rates calculated at checkout.
Does the EM04 Wireless Trackball Mouse come with a warranty?
ProtoArc's published warranty terms: Keyboards, mice and other accessories carry a 2-year warranty from delivery, and furniture carries 3 years, with select premium chairs eligible for 5 to 10 years. Claims go to support@protoarc.com with your order ID and photos or video.
What options does the EM04 Wireless Trackball Mouse come in?
Color: Black, Purple, Silver, Red.
Where can I buy the EM04 Wireless Trackball Mouse?
The EM04 Wireless Trackball Mouse is sold directly by ProtoArc on protoarc.com. The Shop now button on this page goes straight to the product there, and code GFPALEKSANDRBODNAR can be applied at checkout.
Is the EM04 Wireless Trackball Mouse in stock?
Yes. ProtoArc lists it as in stock on protoarc.com as of our latest check. Stock and prices refresh throughout the day.
Is ProtoArc a legit store?
ProtoArc is a smart pick for desk workers who want ergonomic keyboards, mice or a mesh chair without paying premium-brand prices, and its 2-year accessory warranty and free US shipping over $19.99 lower the risk. Skip it if you need a deeply customizable mechanical keyboard or ship to Hawaii, Alaska or an APO address, where service is restricted. Check which layout and OS a keyboard is built for (several models are Mac-specific or UK layout) before you order. Our full ProtoArc review covers shipping, returns and what to check before ordering.
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