> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/hardware-products/hardware/engage-devices/pxxx-series/p400/p400-p400-plus-installation-guide/device-overview.md).
# Device Overview
This chapter provides an overview of the P400 device:
The P400 is Verifone's next generation integrated retail PINpad device. Its touchscreen functionality and sophisticated design is perfect for high-end retail establishments.
The P400 is a consumer-facing handheld device. It can also be fix-mounted in some integrated retail scenarios. The product's design is equally appealing as a handheld PINpad and robust enough to look and function appropriately in a fixed mount setting.
Figure 1: P400 Touch
## Front Functions
The P400 includes the following features:
* Capacitive touch **LCD (Liquid Crystal Display) display**.
* Secure keypad supporting 3x5 matrix containing 0-9, \*, #, Cancel, Backspace/Clear, and Enter keys.
* Supports **telco-style format**.
* Dual-function Backspace/Clear key.
* Customer-entry for Cancel and Enter keys.
Following table lists the functions of Cancel, Enter and Clear/Backspace keys:
| Key | Functions |
| -------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
|  |
Cancel key is used to exit and return to the main menu.
In the System mode login screen, a special menu can be accessed by pressing the Cancel key.
Cancel key is also used to power OFF. Press Cancel key for 3 sec to power OFF the terminal.
|
|  |
Clear key is commonly used to delete a number, letter, or symbol on the PINpad's display screen.
Press Clear key one time to delete the last character typed on a line. To delete additional characters, moving from right-to left, press Clear key once for each character or hold down Clear key to delete all characters in a line.
|
|  |
Enter key is generally used in the same way as the enter key on a PC, that is, to end a procedure, confirm a value or entry, answer "Yes" to a query, or select a displayed option.
Enter key is used to power ON the terminal. Press Enter key for 3 sec to power ON the terminal.
Enter key is also used to restart the terminal. Press Enter key for 10 sec to restart the terminal.
|
## Back Functions
The rear of the P400 device shows the following:
* **Cable connector compartment.**
* **Threaded grommets** for attaching the mounting plate.
* A **uSD** and a dual-stack **MSAM (Multiple Secure Access Module) connectors** built into the back of the unit to support stored-value card programs or other merchant card requirements.
## Features and Benefits
### Ease of Use
* Sleek and stylish shape occupies minimal counter space.
* Bold, ergonomic design fits comfortably in the palm of a hand.
* Large, hard-rubber keys provide improved tactile feedback, minimizing errors and maximizing ease-of-use for consumers of all ages.
* Intuitive telco-style interface and colored control keys simplify training and reduce support requests.
* 320 (RGB) x 480 TFT (HVGA) display with a capacitive touch panel.
* Rugged and reliable design.
* Connects with most POS (Point-of-Sale) payment terminals.
* Supports payment transactions in a variety of payment environments.
### Critical Security Protection
* Offers a choice of Master/Session or DUKPT (Derived Unique Key Per Transaction Method as defined in the VISA's POS Equipment Requirement: PIN processing and Data Authentication, International Version 1.0, August 1988) key-management methods to protect PIN-based transactions.
* Offers secure, reliable PIN (Personal Identification Number) input for expanding range of PIN-based transactions.
* PCI (Payment Card Industry)-compliant for secure solutions, meeting the PED (PIN Entry Device) standard.
* Meets ISO and ANSI (American National Standards Institute) standards for PIN encryption, key management, and MAC.
* Key injection simplified and secured with Verifone's SecureKit key loading software.
* Rugged and reliable design absorbs hard knocks found at point-of-sale counters.
* Removable privacy shield offers option of supplemental physical security.
* Connects with most POS payment terminals, PCs, and ECRs (Electronic Cash Register).
* USB (Universal Serial Bus) Connectivity that gives another option to connect with payment terminals, personal computers, and electronic cash registers (ECRs).
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