VTech CS6509-16 Accessory Cordless Handset, Red | Requires A CS6519 Or CS6529 Series Cordless Phone System to Operate

Know who’s calling with Caller ID/Call waiting-stores 50 calls: Handset displays the name, number, time and date of incoming calls.
With the touch of a button, The handset speakerphone makes hands-free conversations easy.
Backlit keypad and display: the entire keypad illuminates along with the LCD screen, allowing for easier viewing in dim light.
Eco mode power-conserving technology: power-conserving technology manages consumption for optimal battery performance.