The SF521UL single resident bed station features the great range and reliability of 900 MHz signaling. This unit can be wall mounted near any resident location for call placement. It provides a standard 0.25" call cord receptacle along with a reset button. Calls are latched locally to ensure that residents receive direct staff attention. The device includes a call assurance LED as well as cord out detection. The SF521UL features a fully supervised RF link to ensure reliability and to monitor for battery low condition. The battery is a field replaceable 3V lithium. The unit is shipped with the battery switch in the OFF position. Move the battery switch to the ON position before installation.