Electric Free Telephone - No need install battery, connect handset with coed and use line to the transmitter and exchange, then you can start to use it Wall Mounted Phone - Can be mounted on the wall, lightweight and white and simple appearance telephone that can be as decor Multi-function - HOLD function for keep the call online when another calling REDAILING funtion to redial the last number we called last time. And more functions for you to discover at the manual Ringstone Level - You can adjust the ringstone level using the Switch on the back of the phone, switch to l for low volume, h for high volume Wide Application - Compact size and conveniency design, suitable for home, office, hotel guest room, cafe room, etc