The Handlebar Remote, Wristband Remote, RC3 3-Button remote and RC4 4-Button remote are all compatible with the Bluetooth 4.1 models, such as the 10C, 10R, 10S, 10U and 20S.
Tip:  Be sure to check the firmware on your headset is current before attempting to pair with the remote.
 
A pairing guide for each compatible model can be found via these links below
 
Handlebar Remote (SKU:  SC-HR-01)
www.sena.com/product/handlebarremote/#pairingguide
 
Wristband Remote (SKU:  SC-WR-01)
www.sena.com/product/wristband-remote/#pairingguide 
 
RC3 3-Button Remote (SKU:  SC-3B-01)
www.sena.com/product/rc3/#pairingguide 
 
‚ÄčRC4 4-Button Remote (SKU:  tba)
www.sena.com/product/rc4/#pairingguide