New
radiusNewTrue wireless earbuds
radius HP-C28BTF
radius HP-C28BTF is a true wireless earbuds released in June 2026. Key specs: fit In-ear, battery life 3.5 h, Bluetooth version 5.3, water resistance (IPx) IPx4.
4.3Score
Battery2.4
Build & features6.7
price range$70–90Reference price converted from JPY
- Released
- June 2026
- Brand
- radius
- Popularity
- #1,663 of 2,013
In-earFit
3.5 hBattery life
5.3Bluetooth version
IPx4Water resistance (IPx)
Spec guide
How it ranks among true wireless earbuds of 2026
Battery life · 3.5 hBottom 2%Bluetooth version · 5.3Bottom 22%Water resistance (IPx) · IPx4Bottom 22%
Compared with true wireless earbuds released in 2026. Bars show the share of models it beats.
compared with other true wireless earbuds
Why is HP-C28BTF a good choice?
Earbud weight (each): 3 gbetter than 99% of true wireless earbuds
Weak points
Battery life: 3.5 hworse than 99% of true wireless earbuds
Water resistance (IPx): IPx4worse than 99% of true wireless earbuds
In rankings
Specifications
Full specifications
Sound
- Driver size
- 6.1 mm
- Lowest frequency
- 20 Hz
- Highest frequency
- 20,000 Hz
- Impedance
- 16 Ω
- Sensitivity
- 90 dB
Battery & charging
- Battery life
- 3.5 h
- Charging time
- 1.5 h
Connectivity
- Wireless
- Yes
- Hi-res codec (LDAC / aptX HD / LHDC)
- No
- aptX
- No
- LDAC
- No
- USB-C
- Yes
Design & build
- Earbud weight (each)
- 3 g
- Protection rating
- IPX4
- Water resistance (IPx)
- IPx4
Features
- Touch controls
- Yes
- Hands-free calls
- Yes
Specs are collected from manufacturers and open databases and normalised to one format; check details with the seller before you buy.
