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A4Tech FB35 / FB35S specifications and in-depth review

A4Tech FB35 / FB35S

Manufacturer: A4Tech

The A4Tech FB35 / FB35S is a right-handed mouse designed to serve both productivity and gaming use cases, offering dual wireless connectivity through 2.4GHz and Bluetooth 5. Weighing 96 g and measuring 105 mm in length, it strikes a compact, manageable form factor suited to everyday desk use. One of its more distinctive traits is a removable battery rated at 8760 hours, which sidesteps the need for recharging in favor of straightforward battery replacement.

On the technical side, the FB35 / FB35S uses an optical sensor with a maximum resolution of 2000 DPI and a minimum of 1200 DPI, with adjustable steps accessible via a dedicated DPI switching button. The mouse operates at a polling rate of 125 Hz and offers six buttons in total, including two side buttons, all of which are programmable. Gesture support is present, while the design omits RGB lighting, onboard memory profiles, a tilting scroll wheel, and adjustable weights, keeping the overall feature set straightforward and focused.

Pros
  • Supports both 2.4GHz wireless and Bluetooth 5, offering flexible connection options for different setups
  • All 6 buttons are programmable, allowing meaningful input customization
  • Removable battery with a rated life of 8760 hours eliminates downtime from charging
  • Gesture support adds an extra layer of input functionality beyond standard button clicks
  • Compact and lightweight at 96 g with a modest footprint, making it easy to use over extended sessions
Cons
  • Maximum sensitivity of 2000 DPI is relatively limited, which may not suit users who need higher tracking resolution
  • Polling rate of 125 Hz is low, resulting in less frequent position updates compared to higher-end options
  • No onboard memory profiles means settings cannot be stored on the device itself
  • Right-handed only orientation excludes left-handed users
  • Minimum DPI of 1200 is fairly high, leaving no option for very low-sensitivity use
  • No profile switching button, so changing between configurations requires other means
Who is this for?

This mouse works well for right-handed users who need a versatile input device across both productivity and light gaming contexts. The dual wireless connectivity via 2.4GHz and Bluetooth 5 makes it a practical choice for people who switch between devices regularly, such as those managing a laptop and desktop simultaneously. The removable battery with an exceptionally long rated life suits users who prefer uninterrupted sessions without the need to manage charging cables or schedules. Gesture support also adds appeal for those who rely on gesture-based navigation in their daily workflow.

Who is this NOT for?

Users engaged in competitive or fast-paced gaming will likely find the 125 Hz polling rate insufficient, as it delivers fewer position updates per second than what demanding gaming scenarios typically require. The maximum 2000 DPI ceiling similarly limits the mouse for anyone who depends on high-sensitivity tracking, such as users with large, high-resolution displays. Left-handed users are entirely excluded by the right-handed-only design, and the absence of onboard memory profiles makes this a poor fit for those who frequently move between machines and expect their custom button configurations to travel with the device.

Performance:

polling rate 125 Hz
maximum DPI 2000 DPI
minimum DPI 1200 DPI
has adjustable DPI ✓

The A4Tech FB35 / FB35S operates at a polling rate of 125 Hz and features an optical sensor with a maximum sensitivity of 2000 DPI and a minimum of 1200 DPI. DPI adjustment is supported, allowing users to switch between sensitivity levels within that range as needed.

General info:

Type Productivity, Gaming
connection type 2.4GHz wireless, Bluetooth
sensor Optical Sensor
onboard memory profiles 0
Bluetooth version 5
has gesture support ✓
Battery life 8760 hours
has a rechargeable battery ✕
has a removable battery ✓

The FB35 / FB35S is categorized as both a productivity and gaming mouse, connecting via 2.4GHz wireless or Bluetooth 5, and relies on an optical sensor for tracking. Gesture support is included, adding an extra layer of input flexibility. The mouse carries no onboard memory profiles and does not have a rechargeable battery; instead, it uses a removable battery with a rated life of 8760 hours, making battery swaps the standard method for keeping it powered.

Buttons:

number of buttons 6
number of side buttons 2
number of programmable buttons 6
has a DPI switching button ✓
has a profile switching button ✕

The FB35 / FB35S comes with 6 buttons in total, including 2 side buttons, and all 6 are programmable, offering a fair degree of customization for different workflows. A dedicated DPI switching button is present for on-the-fly sensitivity adjustments, while a profile switching button is not included.

Design:

Orientation Right-handed
weight 96 g
has RGB lighting ✕
has a tilting scroll wheel ✕
has a thumb scroll wheel ✕
has extra weights ✕
volume 308.7 cm³
thickness 42 mm
height 105 mm
width 70 mm

The FB35 / FB35S is a right-handed mouse with a weight of 96 g and physical dimensions of 105 mm in height, 70 mm in width, and 42 mm in thickness, giving it a volume of 308.7 cm³. The design is straightforward and unadorned — there is no RGB lighting, no tilting or thumb scroll wheel, and no provision for extra weights, keeping the overall build clean and free of additional hardware complexity.

Final Verdict

The A4Tech FB35 / FB35S is a straightforward wireless mouse that positions itself squarely at users who value flexibility and low-maintenance operation over raw performance. Its dual connectivity and fully programmable button layout give it genuine practical utility across both productivity and casual gaming scenarios, while the removable battery rated at 8760 hours stands out as a defining convenience for users who want a reliable, fuss-free experience. That said, its 125 Hz polling rate and 2000 DPI maximum place a clear ceiling on what it can deliver in demanding or precision-driven tasks. For right-handed users who need a dependable, versatile everyday mouse without the overhead of charging routines, the FB35 / FB35S presents a coherent and well-defined option within its category.

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