This Siemens EasyTek Smart Connect Audio Streamer is a used hearing amplifier designed to enhance hearing abilities. It is a practical device that allows users to connect wirelessly to audio sources like smartphones and TVs, providing clear and amplified sound directly to the user's ears. With the Siemens brand reputation for quality, this hearing amplifier offers a convenient solution for those in need of hearing assistance. part number is 3SMETEK1 please see below link https://davidsonhearingaids.com/wp-content/uploads/2018/01/easyTek-How-To-Guide.pdf