The Grandstream WP820 is a versatile cordless IP phone that combines the convenience of Wi - Fi and Bluetooth connectivity with the power of VoIP technology. It supports dual - band Wi - Fi (802.11a/b/g/n) for reliable wireless communication and features a rechargeable 1500mAh battery that provides up to 7.5 hours of talk time and 150 hours of standby time. The phone is equipped with HD voice quality, dual microphones, and advanced noise shield technology, ensuring clear and crisp audio during calls. With support for two SIP accounts and two lines, the WP820 is ideal for both personal and professional use. It also includes a 3.5mm headset jack and a micro USB port for added connectivity options. The device is designed to be user - friendly, featuring a 2.4 - inch color LCD display and an intuitive interface that supports custom Android applications.