Verifone M425 readerPrivate preview

The Stripe Terminal SDK connects to the M425 reader over Bluetooth Low Energy (BLE). This reader is compatible with the following integrations:

• iOS SDK
• Android SDK
• React Native SDK

We recommend using the M425 with one of the mobile SDKs (iOS, Android, or React Native), because it requires a host device with Bluetooth capabilities. Server-driven integrations aren’t compatible with this reader.

To view the reader’s parts and features, see the M425 product sheet.

Turn the reader on and off

The M425 is a compact, Bluetooth-enabled card reader that doesn’t have a display.

• To turn on: Press and hold the power button for about 2 seconds until the LED indicator lights up.
• To turn off: Press and hold the power button for about 5 seconds until the LED indicator turns off.

Power button

Charge the M425 device before initial use by connecting the provided USB-C cable to the charging port on the reader. Connect the other end of the cable to a power source (wall adapter or computer USB port). The LED turns solid red while charging and turns off when fully charged.

The M425 has a rechargeable battery that can last up to 10 hours with normal use. To preserve battery life, turn off the reader when not in use for extended periods. Avoid letting the battery charge fall below 10%, because that can diminish battery capacity over time. Charge the device regularly, especially if it hasn’t been used for a while.

In a mobile deployment, the M425 is designed for portability and can operate for a full day on a single charge with normal use. The device can last several days in standby mode.

Always use Verifone-approved power adapters and cables for charging to ensure proper operation and to maintain your product warranty.

Connect the reader to the internet

The M425 is a Bluetooth Low Energy (BLE) reader that doesn’t connect directly to the internet. Instead, it communicates with a host device (such as a smartphone or tablet) running your point of sale application. The host device handles the internet connection and communicates with Stripe.

Your point of sale application communicates with the reader using a Terminal SDK.

To ensure that your M425 receives the latest firmware updates:

1. Pair it regularly with a device running the latest version of your point of sale application.
2. Keep your point of sale application up to date, because firmware updates are often delivered through the application.

If you’re running into issues connecting your reader to the internet, see the M425 troubleshooting guide.

Bluetooth connectivity

To connect the M425 to your host device:

1. Enable Bluetooth on your host device.
2. Press and hold the reader’s power button for 5 seconds until the LED flashes blue, to turn on pairing mode.
3. Use your point of sale application to discover and pair with the M425.

For detailed pairing instructions, refer to the M425 product sheet.

Battery and charging

The M425 has a rechargeable battery that can last up to 10 hours with normal use. To charge the device:

1. Connect the provided USB-C cable to the charging port on the M425.
2. Connect the other end of the cable to a power source (wall adapter or computer USB port). The LED turns red to indicate charging.
3. When the LED turns off, it’s fully charged, and you can disconnect the cable.

LED indicators

The M425 doesn’t have a screen, so there are no on-screen prompts or options for powering on or off. The device status is communicated through its LED indicator:

• Solid green: Ready to accept payment
• Flashing blue: In pairing mode
• Solid red: Charging
• Flashing red: Low battery

Additional features and accessories

The M425 supports contactless (NFC) payments, including Apple Pay and Google Pay. It also has a built-in EMV chip reader for chip cards. The device is compact and portable, making it suitable for mobile businesses. To learn about its accessories, see Verifone accessories.