Sennheiser BA 300 Spare battery
RI 410, RS 4200, RR 4200, RI 830, HDI 830, SET 900, RI 900, Set 840-TV, RR 840, Set 840 S, RR 840 S, Set 830-TV, Set 830 S, RI 830 S, IS 410
Sennheiser BA 300 Spare battery
RI 410, RS 4200, RR 4200, RI 830, HDI 830, SET 900, RI 900, Set 840-TV, RR 840, Set 840 S, RR 840 S, Set 830-TV, Set 830 S, RI 830 S, IS 410
Yes...is also compatible for the TR 4200 model!