Sennheiser EZL 2020-20L, Charging Case, For up to 20 HDE 2020 stethoset receivers (article #227378#) and 1 SK 2020 (article #110566#), and BA 2015 replacement battery (article #167050#), Fast charge in about 2.5 hours, Copy function for setting channel and volume, 230 V power supply, Compatible power adaptor: Article #101546# (not included)