The KX-TU400 offers long battery life—up to 450 hours on standby—depending on usage and battery condition. The KX-TU400 clamshell phone combines style and functionality with an emergency call button, easy usability, and a large, bright 2.4-inch display. Enjoy a long battery life, shock resistance up to 1.5m, and large backlit buttons for effortless dialing. Its loudspeaker ensures you won't miss calls in noisy settings, and the priority call feature dials up to 5 contacts automatically in hands... Clamshell to match you style , Easy to see 2., 4 inch bright TFT display make reading from it effortless even in the bright sun. Panasonic KX-TU400EXC Turquoise KX-TU400EXC Shock Resistant Clamshell Panasonic KX-TU400EXC Senior Mobile Phone For Folding, Without Contract (SOS Emergency Button, Large Separate Buttons, Large Font, Wireless Device), Mint Kids Phone Pressing the priority call button automatically starts a hands-free call to up to five preset numbers in sequence. This user manual provides comprehensive instructions for the Panasonic KX-TU400EXC mobile phone, covering setup, operation, maintenance, and troubleshooting for its features like large backlit buttons, a clear display, and the priority call function With KX-TU400 loud speaker it’s easy to hear the phone ringing even in the loud environments. Easy to use Large backlit buttons make dialing easy and convenient even without glasses.