Reduce unwanted calls, such as those from telemarketers. You can block any number you specify, as well as any 2- to 8-digit line that matches the numbers or non-numbers you provide. Compact design: This phone is compact enough to fit in tight spaces. The simple and stylish look complements the decor of various rooms. Speakerphone: You can speak hands-free, which is convenient when you need to write something down. Additionally, anyone nearby can join the conversation. One-click ECO mode: Simply press the dedicated ECO button. Compared to normal mode, signal output is reduced by up to 90% and power consumption by about 3.5%. In ECO mode, the ECO indicator is clearly displayed on the LCD monitor to show that the mode is activated. The caller ID service offered by your service provider is required.