Logitech M340 Mouse: Specs, Setup & Fixes

The Logitech M340 is a compact wireless mouse designed for everyday office and home use, offering a 1000 DPI optical sensor and a 2.4 GHz USB receiver. You plug in the receiver, insert one AA battery, and it works immediately with Windows, macOS, ChromeOS, and Linux. This article covers its specifications, setup, common problems, and how it compares to similar models.

Background and Positioning

Logitech introduced the M340 as a budget-friendly replacement for older models like the M310 and M320. It sits below the more expensive M330 Silent Plus and MX Master series. The M340 is often bundled with Logitech wireless keyboard combos (e.g., MK340) but is also sold separately. Its main selling points are low price, plug-and-play simplicity, and a comfortable right-handed shape. Unlike the M330, the M340 does not emphasize silent clicks—it produces a standard audible click.

Key Specifications

Sensor: Optical, 1000 DPI (not adjustable)
Connectivity: 2.4 GHz via Logitech USB receiver (nano dongle)
Battery: One AA battery (alkaline or rechargeable)
Battery life: Approximately 12 months (manufacturer estimate, varies with usage)
Buttons: 3 (left, right, scroll wheel click)
Scroll wheel: Notched, not tiltable
Dimensions: ~105 x 67 x 38 mm (4.1 x 2.6 x 1.5 in)
Weight: ~85 g (3 oz) including battery
Compatibility: Windows, macOS, ChromeOS, Linux, Android (with OTG cable)

How It Works

The M340 uses a 2.4 GHz radio frequency (RF) connection. The included nano receiver broadcasts at 2.4 GHz, and the mouse sends data packets at a default polling rate of 125 Hz (8 ms response time). The optical sensor tracks movement on most surfaces except glass or mirrors. The mouse uses Logitech’s “Advanced Optical Tracking” which is a marketing term for a standard LED sensor. There is no Bluetooth version of the M340; it is RF-only. The receiver is not a “Unifying” receiver, so you cannot pair it with other Logitech devices (except via the newer Logi Bolt, which the M340 does not support).

Setup and Pairing

Open the battery compartment (slide the cover off).
Insert one AA battery with correct polarity (+ and -).
Remove the nano receiver from the storage slot inside the battery compartment.
Plug the receiver into a USB-A port on your computer. If you only have USB-C ports, use a USB-A to USB-C adapter (not included).
Turn on the mouse using the power switch on the bottom (slide to “ON”).
The mouse should work immediately. If not, move the receiver closer or try a different USB port.

There is no software required for basic use. Logitech Options or Logitech G Hub are not needed because the M340 has no programmable buttons or adjustable DPI. The scroll wheel acts as a middle button when pressed.

Common Problems and Fixes

Cursor not moving: Check battery orientation, power switch, and receiver connection. Try a different USB port.
Mouse works but scroll wheel jumps: Dust or debris inside the wheel encoder. Blow compressed air into the gap, or use a cotton swab with isopropyl alcohol (unplug first).
Double-click issue: This occurs when the microswitch wears out. It is not user-serviceable; consider replacing the mouse if under warranty.
Receiver lost: The M340 uses a unique receiver, not Unifying. You cannot pair a new receiver without Logitech’s proprietary pairing tool, which is not available for this model. You must purchase a replacement receiver from Logitech or buy a new mouse.
Battery drains fast: If you use a rechargeable AA, note that the mouse may not work when voltage drops below ~1.2V. Use a fresh alkaline battery for best performance.

Comparison with Similar Mice

The M340 is often compared to the Logitech M330 Silent Plus. The M330 has a rubberized grip, quieter clicks, and a slightly larger shape. The M340 is cheaper and has a glossy finish. Another comparison is with the Logitech M185, which is nearly identical but has a different model number and sometimes comes with a smaller receiver. The M340 lacks the “Silent” technology, so it is not suitable for quiet environments if you mind click noise. It also lacks a tilt wheel, so horizontal scrolling is not possible.

Cost and Value

The M340 is priced in the budget range (typically under $20 USD). It is a good value for basic tasks like web browsing, document editing, and spreadsheet work. However, it is not designed for gaming or graphic design due to its fixed DPI and lack of extra buttons. For those uses, consider a mouse with adjustable DPI and side buttons.

Frequently Asked Questions

Is the Logitech M340 compatible with Mac?

Yes, it works on macOS without additional drivers. Just plug in the receiver and the mouse functions normally. The scroll wheel and click work, but the “Mission Control” gesture is not available because there are no extra buttons.

Can I use the M340 with Bluetooth?

No, the M340 only uses a 2.4 GHz USB receiver. It does not have Bluetooth. If you need Bluetooth, look for the Logitech M355 or M650.

Does the M340 have a Unifying receiver?

No, the M340 uses a non-Unifying receiver. You cannot pair it with other Logitech devices. The receiver is specific to this mouse model.

How long does the battery last?

Logitech estimates about 12 months with typical use (2 hours per day). Actual battery life depends on the battery type and usage patterns. Using a high-quality alkaline battery is recommended.

Can I adjust the DPI?

No, the M340 has a fixed 1000 DPI sensor. There is no software to change sensitivity. If you need higher or lower DPI, consider a different mouse.

Is the M340 good for gaming?

No, it is not designed for gaming. The 125 Hz polling rate and fixed DPI are insufficient for fast-paced games. It also lacks programmable buttons and a high-quality sensor.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.

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