Hoober HG4 HYDRO PRO: Specs, Pros & Cons
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Photographed and tested by our team
A lightweight, no-fuss robot for daily hard-floor maintenance, but its basic mopping and low suction leave it outclassed by similarly priced competitors.
Picking up the HG4 is genuinely surprising — at 2.7 kg it feels like a toy, and carrying it between floors is effortless. The compact self-empty dock is a nice touch too, taking up less shelf space than most competitors. That is where the good news ends. At 4,000Pa in 2026, the suction is a generation behind everything else at $400, and the clip-on mop pad is just a damp rag with no vibration or pressure. Czech buyers might appreciate Hoober's local support and warranty, but on pure performance, a similarly priced Roborock or Dreame will clean circles around it. Only makes sense if portability and compact dock footprint are your top priorities.
Key Specs at a Glance
Pros & Cons
What We Like
- + Extremely lightweight at 2.7 kg — easy to carry between floors
- + Compact self-emptying dock takes up less counter space than rivals
- + LiDAR navigation maps rooms quickly and accurately
- + Good edge-cleaning performance despite no swing-out side brush
- + Quiet enough for daytime use at measured 58 dB on standard mode
What Could Be Better
- − Mopping is very basic — clip-on pad with no vibration or downward pressure
- − 4,000 Pa suction trails far behind modern flagships on deep carpet cleaning
- − No obstacle avoidance camera — bumps into shoes, cables, and pet toys
Full Specifications
| Suction Power | 4,000Pa |
|---|---|
| Navigation | LiDAR laser navigation with real-time mapping |
| Mop Type | Clip-on microfibre pad with 300ml water tank |
| Dock Features | Self-emptying base with 2.5L dust bag capacity |
| Battery Life | 130 min |
| Noise Level | 65 dB |
| Height | 3.9" |
| Weight | 5.95 lbs |
| Special Feature | Unusually compact and lightweight design at just 2.7 kg — one of the lightest self-emptying robot vacuums available |