Multi Function: Mute, Pause, Flash, Redial, P/T dual mode ^^
Ringer(Hi&Low): 'Hi' means high, 'Lo' means low and 'OFF' is turned off ^^
Mechanical Lock: The locking key located on the bottom of the phone. To change it, you must using a switch that comes with the unit.
The lock has two positions: With the key in the green position, the lock is disabled, allowing the phone to perform any type of call. With the key in the red position, no call can be made ^^ [Durable ABS plastic shell] Made of high-quality materials, creating a more comfortable office environment for you ^^
Product List: Telephone Base x1, Handset x1, Handset Cord x1, Phone Line x1, User Manual x1