HD Voice, Conference Calling and Internet Gateway for a Full Fixed Wireless Experience The V810 home phone connect is based on LTE network and uses VoLTE to provide HD voice support. It is 100% replaceable for the telephone line. IT'S RELIABLE With a standby battery life of up to 36 hours, the V810 is reliable, even when you're not connected via the power cable. It also boasts a AA battery function for voice calling. IT'S SIMPLE The LCD Display gives users insight on the device's battery level, LTE signal, call status, WiFi, whether they have any voicemails and who is calling, so there is no guesswork involved. IT'S FUNCTIONAL The V810 Home Phone Connect Series allows users to use VoLTE and it provides HD voice support. It even supports conference calling up to 6 callers. AA batteries can be used to keep the HPC working without being connected to power for up to 36 hours on standby. Includes 2500mAh battery and external antenna.