The EZL 2020-20L charging case has been designed for ease of use. It serves both as a storage case for all equipment and as a charging station for the Tourguide receivers and transmitter. It offers twenty charging bays for HDE 2020-D or EK 2020-D receivers and two charging bays for the transmitter or its rechargeable battery. A really impressive feature of the charging case is its Copy button. You only need to set one receiver to the correct channel, press this button once, and all other receivers in the case will immediately be set to the same channel.