【DECT 6.0 Covers 1000ft Distance】Having dedicated years to the study of telecommunication devices, our brand has gained the admiration of numerous users. DECT 6.0 technology provides greater coverage, clearer sound quality, more stable signals and safer communications. This technology reduces interference and guarantees private conversations.

【Backlit Display & Big Buttons for Better Visibility】High-contrast handset display and big buttons make it easy to view who's calling and dial even in low-light. Add up to 4 handsets, helping you stay connected in multiple rooms.

【Full-Duplex Speakerphone & Long-Lasting Battery Life】It allows you to keep your hands freedom during a call; it enables all participants to hear the conversation, facilitating group discussions. With an extended battery life of up to 10 hours of talk time and up to 200 hours on standby, our cordless phone ensures uninterrupted conversations without the hassle of frequent recharging. (When charging the cordless phone for the first time, please charge it continuously for 16 hours.)

【View Phonebook & Call Records for Fast Dialing】100 names and numbers phonebook directory, 50 names and numbers caller ID records, 10 redial phone numbers, and 2 fast dialing numbers. Up to 100 numbers can be added to the blacklist with one-touch.

【Register A Handset】Normally, the 4 handsets of HB1688-4 automatically pair with the base. If not, locate the registration option on the handset, enter PIN 0000, and long-press the signaling button on the base for 7 seconds to complete pairing. Refer to manual section 8.7 for additional details.