Gigaset A510 A Quattro 4-Pack DECT6.0 Cordless Phone - Made in Germany Large and illuminated 1.8 black and white display with 4 different color backlights. Brilliant HSP sound quality. Hands-free talking with adjustable volume. Eco Mode and power consumption of less than 0.4 Watt. Long talk/standby time of up to 20/220 hours. 20 selectable ring tones. Customized ring tones and color backlights for special contacts.