The Gemini Basic offers incredible value for money without compromising on quality. Its stylish new design and rugged build quality are sure to make it a popular choice for buyers on a limited budget. Triple standard message waiting (high voltage, reverse polarity & voltage drop). - Headset port. - Locking mute button with LED indicator. - ELR/TBR switchable. - Last number redial. - Recall button. - Ringer volume adjust. - Ringer indicator light. - Wall mountable - no additional bracket required. - Hearing aid compatible.