VTech LS6405. The VTech LS6405 accessory handset is equipped with the latest DECT 6.0 technology which delivers increased clarity and enhanced security features. This single-line operation phone is packed with the best VTech features and would make a great addition to the modern-day household. The blue backlit keypad and LCD make for easy dialing in low-light situations and the 50-station phone directory helps you keep track of your most important contacts. Additional features include trilingual menu support and selectable ringtones. LS6405.