Sennheiser POWER ADAPTER FOR TC- W CASE (506728)

the SP 10 and SP 20 are small lightweight yet robust speaker phones weighing only 210 grams both devices come with a USB connector however the SP 20 also comes with a 3.5 millimeter jack all cables can be conveniently stored away within the unit itself they also feature Sennheiser HD sound and Sennheiser voice clarity as well as a music mode for optimized music reproduction when connected to a supported softphone volume control muting and answering and ending calls are all possible using the controls on the device the internal battery of the SP 20 will provide for up to 20 hours talktime and 30 hours standby time between charges and charging is done by simply connecting the device via USB the SP 10 draws its power straight from the device to which it is connected the SP 20 also features the ability to connect two separate devices and join them in on the one call the SP 10 and SB 20 both