Dect Plus technology takes the superb sound quality and outstanding range of DECT 6.0 phones to a whole new level. By increasing the frequency of error correction up to 80x, the transmission quality is improved and the phone's range is extended. Engineered to work in 1.9GHz frequency, our DECT 6.0 phones won't conflict with common wireless devices such as 2.4GHz routers, wireless keyboards and mice, microwave ovens and other household items. And because it's digital, you'll enjoy long range and clear sound while deterring eavesdropping. Expandable up to 6 Handsets. Up to 4-way Conference Capability. Ringer ID. Light-up Indicator with Ringer/Charge Alert. Lighted Handset Keypad. Call Waiting Caller ID. Handset Locator. Handset Intercom.