SIM Card Slot: Works with standard cellular networks on GSM 850/900/1800/1900 MHz frequencies.LCD Display Screen: Shows caller ID, signal strength, battery level, and call logs.External Antenna: Screws into the side to boost cellular signal reception in areas with weak coverage.Power Adapter: Connects the phone to a standard electrical wall outlet for power and internal battery charging.Function Buttons: Includes dedicated keys for hands-free calling, redialing, and menu navigation