The Nulea M505B is a wireless trackball for the right hand. You move the cursor by rolling a 44 mm ball with your index finger, so the mouse itself stays still[1]. It connects over Bluetooth or a USB receiver, switches between up to three devices, has five DPI steps and an RGB light, and charges over USB-C[1].
Key facts
- Model M505B, with a 44 mm index-finger trackball[1].
- Bluetooth or 2.4 GHz USB receiver, with switching between three devices. The receiver stores in the bottom of the mouse[1].
- Five DPI steps from 200 to 1600[1].
- Built-in battery rated for up to 45 days per charge, charged over USB-C[1].
- Right-handed, six buttons, one-year warranty[1].
What is it, and which model is this?
The listing’s item details give the model as M505B. The bullets call it the Nulea M505[1]. The plain M505 is the same mouse without a light around the ball. The M505B adds that light ring[2].
It’s a finger trackball, not a thumb trackball. The 44 mm ball sits where your index and middle fingers rest, and the body doesn’t move[1]. Nulea says the shape fits the curve of the hand, and that the ball eases wrist and arm strain. Those are Nulea’s claims[1].
Nulea says the M505B suits medium to large hands[1]. It’s built for the right hand only[1].
How does it connect, and to what?
It connects over Bluetooth or a 2.4 GHz USB receiver, and it switches between three devices[1]. The receiver comes with the mouse. It’s stored in a slot on the bottom[1].
The listing names PC, laptop, Mac, iPad, Windows and Android. Its spec fields give Windows 10 and Android 10 as the minimum versions[1]. On a Mac, the forward and back buttons don’t work, says Nulea[1].
What are the buttons and DPI settings?
Amazon lists six buttons. Nulea’s diagram shows left and right buttons, a scroll wheel, and forward and back keys[1]. None of them can be reprogrammed on the mouse[1].
A DPI button on the underside steps through 200, 400, 800, 1200 and 1600 DPI. A blue light in the scroll-wheel slot shows the setting[1].
How long does the battery last, and how does it charge?
The battery is built in and rechargeable. Nulea rates it for up to 45 days on a full charge[1]. It charges over USB-C with the included USB-C to USB-A cable. The light shows red while charging and green when full[1].
In wireless mode, it sleeps 30 minutes after you last use it. Click a button to wake it. Rolling the ball doesn’t wake it[1].
How do you turn the RGB light off?
Hold the left and right buttons together for three seconds. That turns the light on or off[1]. The light is a ring around the ball. One owner found it comes back on each time the mouse powers up[2].
Can you clean the ball?
The ball lifts out of the body[2]. Nulea doesn’t publish cleaning steps. As with any trackball, wipe the ball and the support points under it when tracking feels rough.
What does it cost, and what’s the warranty?
Amazon’s price changes often, so check the listing for today’s price[1]. Nulea gives a one-year warranty[1].
Pros and Cons
Pros
Final Verdict
Get the Nulea M505B if you’re right-handed, use Windows or Android, and want a finger trackball that pairs with a few machines and charges over USB-C[1]. Skip it if you’re left-handed or have small hands. Mac users lose the forward and back buttons, and nobody can remap the buttons[1].
Key Takeaways
Frequently Asked Questions
Is the ball under the thumb or the fingers?
The fingers. The 44 mm ball is moved with your index finger[1].
Does it come with a USB receiver?
Yes. The 2.4 GHz receiver is stored in the bottom of the mouse[1].
How many devices can it switch between?
Three, over Bluetooth or the receiver[1].
What is the battery life?
Nulea rates it for up to 45 days on a full charge. It charges over USB-C[1].
Does it work with a Mac?
The listing names Mac. The forward and back buttons don’t work on macOS[1].
How do you turn the RGB light off?
Hold the left and right buttons together for three seconds[1].