The 7700 series telephones feature a totally new low profile, sleek design with a European style handset that will compliment most home or office dÿcors. In addition to the new design, we have made the following improvements to all models: 24 Programmable Buttons: All phones have 24 programmable buttons. (This has been a frequent request from many dealers especially for residential installations) 12 buttons are illuminated for use as CO, Direct Station Select (DSS), Feature or Personal keys. The other 12 buttons can be programmed as Personal /Feature keys. Navigation/Volume Key: All models have a large circular button, conveniently located in the lower right corner of the phone. On the KX-T7731 and the KX-T7737 this button functions as Navigation key allowing the user to select and change telephone speaker, handset and headset volume, or to set the backlit LCD display contrast. On the KX-T7750 and the KX-T7720 this key operates as a volume key. 2.5mm Headset Jack: All telephones are equipped with a convenient industry standard 2.5mm headset jack for connection and use of a hands free headset. Large Dual Function Message Waiting Lamp: All models have a large dual function LED mounted at the top right of the telephone, clearly visible from most any angle. This indicator serves as both a Message Waiting Lamp in addition to flashing during ringing of incoming calls. Adjustable Base: All models feature a new high/low adjustable base as well as convenient wall mounting | 
