Features: Electric Free Telephone - No need to 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 to keep the call online when another calling; RETAILING function to redial the last number we called last time. And more functions for you to discover at the manual. Ringtone Level: You can adjust the ringtone 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 convenience design, suitable for home, office, hotel guest room, caf room, etc. Specification: Model: ST-309 Material: ABS Color: White Size: 20.2 x 5.6 x 3.3cm; Handset: 19.7cm Weight: 8.2oz/231g Package Size: 21.6 x 8 x 7.1cm/8.5 x 3.1 x 2.8in Package Weight: 328g/11.6oz Packing List: 1 x Base Unit 1 x Handset 1 x Coil Cord 1 x Line Cord 1 x User Manual (English)