Features:1. No battery required, no need to install battery. Plug and play.2. Easy to install, can be wall-mounted, can be placed on the desktop, and can be hung on the wall. Save space as you like.3. One-touch redial function. Dial the redial button to dial, convenient and fast.4. With flash function.5. Compatible with FSK/DTMF dual system automatic identification.6. High quality ABS material. Durable for longterm use.Specifications:Power supply: telephone line power supply, no external power supply requiredInterface: RJ45 (6P2C)Installation: support wall hanging and flat desktopSize: about 20.8*12.6*4.2cm/8.19*4.96*1.65inCaller ID: NoNumber storage: noColor: Red Black OptionalPackage List:1 * Telephone1 * Handle Cable1 * Telephone Cable.