VTech LS5105 Accessory Cordless Handset, Silver/Black | Requires a VTech LS5145 or LS5146 Expandable Phone System to Operate Cordless handset for use with LS5145 and LS5146 Bluetooth connectivity--answer and make calls with your Bluetooth cell phone High-resolution 64K color display Memory for 100 phonebook entries 5.8 GHz digital spread spectrum technology