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.