RM-B1
Up to 9 hours of playtime, you can enjoy music throughout workout
Magnetic earbuds in behind-the-neck style provide extra secure fit
With Bluetooth 4.1 chipset, it is compatible with most digital devices
APT-X lossless codec reveals audio as great as CD level
Tilt in-ear earbuds deliver comfortable wearing experience
Various statuses are prompted by user-friendly vibration
![](https://richandmich.com/wp-content/uploads/2020/07/rm-b1.png)
CSR8645
V4.1
100mAh
6h
4h-9h
6h
200h
DSP
RM-B2
Magnetic earbuds
Ergonomic shark fin stabilizer
$ 12mm dynamic driver offers extensive and vibrant bass
8 hours of music time
![](https://richandmich.com/wp-content/uploads/2020/07/rm-b2.png)
WT200S
V4.2
90mAh
6-7h
5-5h
2h
180h
DSP
RM-B3
Independent sound cavity
$10mm neodymium magnet driver gives strong bass
CVC6.0 noise cancelling & APT-X support
IPX4 Sweatproof & waterproof
![](https://richandmich.com/wp-content/uploads/2020/07/rm-b3.png)
CSR8645
V4.1
100mAh
7h
6h
1h-2h
200h
CVC6.0
RM-B4
Magnetic switch
Magnetic earbuds enables it to be a necklace right away
As easy as one press to play/pause music
Join/separate two earbuds to answer/end a call
![](https://richandmich.com/wp-content/uploads/2020/07/rm-b4.png)
CSR8645
V4.1
90mAh
6h
5.5h
1-2h
180h
CVC6.0
RM-B5
14g body delivers ultra-light and comfortable wearing experience
10mm drivers provide perfect ambiance
Behind-the-neck style makes it stable even in vigorous exercise
Apt-X reproduces sound as great as CD level
![](https://richandmich.com/wp-content/uploads/2020/07/rm-b5.png)
CSR8645
V4.1
90mAh
6h
5h
2h
160h
CVC6.0
RM-B6
Super light body
Ergonomic shark fin stabilizer
CVC6.0 noise cancelling & APT_X support
IPX4 Sweatproof & waterproof
![](https://richandmich.com/wp-content/uploads/2020/07/rm-b6.png)
WT200
V4.2
90mAh
4h
6h
1-2h
155h
DSP
RM-B7
Evolved edition of QY7
7 Hours of Playback
Tilt-in Ear Design
APTX Supported
![](https://richandmich.com/wp-content/uploads/2020/07/rm-b7.png)
CSR8645
V4.1
80mAh
5h
7h
1-2h
175h
CVC6.0
RM-B8
Monumental Item
Large Diagram
APTX Support
![](https://richandmich.com/wp-content/uploads/2020/07/rm-b8.png)
CSR8645
V4.1
80mAh
5h
7h
1-2h
175h
CVC6.0