What's in the box:

1 X Car TPMS Tyre Pressure Monitoring System Solar Power Charging Digital LCD Display Bar/PSI Unit w/ 4 Internal Sensors (1), 1

This TPMS comes with a 2 way rechargeable battery that can be charged by solar energy or mini USB charging slot. Wireless transmission, no wire connection is needed. Real-time monitoring tire pressure and temperature. TPMS can help you to avoid tire accidents due to tire failure, to reduce the fuel consumption and to extend the tire life.

Features:
Real-time monitoring tire pressure and temperature at the same time.
Display with visual and audible warning; Adjustable threshold of tire pressure.
Wireless transmission, no wires connection is needed; Place on dashboard freely.
2 methods rechargeable battery; can be charged by solar energy or mini USB charging slot.
Convertible pressure unit (Bar / PSI); Sleeping mode available.

Specifications:
Sensor Type: Internal / External (optional)
Transmission Frequency: 433.92MHz
Pressure unit: Bar / PSI
Operating Temp.: -20 - +85 ?
Alarm Pressure Adjustable Range: 14-65Psi / 1.0-4.5bar
Pressure Sensitivity: 0.1Bar(1.5Psi)
Package Size: 20 * 19 * 6cm / 7.8 * 7.4 * 2.4in
Weight: 653g / 1.4lbs

Package List:
1 * Display
4 * Sensors
1 * Cable
1 * Set of Accessory
1 * User Manual