Compatible with the following headsets:
CS500 Series: CS510, CS520, CS530, CS540, and all -XD variants
Savi Series: W710, W720, W730, W730, W740, W745 and all -M variants
Savi Series: W8210, W8220 and all -M variants
Compatible with the following phones:
Grandstream GXP 2124, 2200, 2130, 2130v2, 2140, 21604 & GXV 3240, 3275 and NEC DT820