0. CLEAR COVER option
https://www.bluetoothexp.com/
(ask for wholesale price, min order 100pcs)
SENA main unit + Clamp kit protection : all buttons functioning for following models:
1. 20S, 20S EVO
(Jog dial + phone button)
2. 30K and 50S
(Jog dial + phone button + easy use MASH button)