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Comparing 2 robot vacuums

Your shortlist side by side: today’s price, our score and every fact the maker states.

Green is the best of these 2, also when they share the lead.

Soundcore Liberty 4 NC × Best on 1 fact Soundcore Space A40 × Best on 1 fact
Most important facts
Lowest price same on both $99Soundcore (brand store) $99Soundcore (brand store)
Score same on both 9.9 9.9
Customer rating ★ 4.3 · 217 reviews –
Active noise cancelling same on both Adaptive Adaptive
Battery life with noise cancelling same on both 8 h 8 h
Weight 5.2 g 4.9 g best
Bluetooth version 5.3 best 5.2
Water and dust resistance same on both IPX4 IPX4
Bluetooth codecs LDAC SBC, AAC, LDAC
Multipoint same on both yes yes
Rank
Rank rank 1 of 28 with an in-ear fit rank 2 of 28 with an in-ear fit
Battery
Battery life without noise cancelling same on both 10 h 10 h
Battery life with the case same on both 50 h 50 h
Fast charge time same on both 10 min 10 min
Playback from a fast charge same on both 4 h 4 h
Wireless charging same on both yes yes
Charging port – USB-C
Build and fit
Form factor same on both In-ear In-ear
True wireless same on both yes yes
Wireless same on both yes yes
Wired connection same on both None None
Audio over USB-C same on both no (assumed) no (assumed)
Controls same on both Touch Touch
Microphones same on both 6 6
Driver size – 10 mm
Ear tip sizes in the box – 4
Remappable controls – All controls
Sound
Lowest frequency same on both 20 Hz 20 Hz
Highest frequency 40,000 Hz 20,000 Hz
Hi-Res Audio certified same on both Hi-Res Audio Wireless Hi-Res Audio Wireless
Equaliser in the app same on both yes yes
Spatial audio yes no (assumed)
Noise cancelling
Transparency mode same on both yes yes
Hearing aid function same on both no (assumed) no (assumed)
Wireless
Auracast same on both no (assumed) no (assumed)
Google Fast Pair yes –
Made for same on both Any phone Any phone
Wireless range 10 m –
LE Audio – no (assumed)
In use
Wear detection yes no (assumed)

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