This product can help monitoring tire pressure， prevent flat tire， save fule， reduce tire wear.

Features:
100% DIY installation.
Match with valve-cap external sensors.
Real time monitoring.
Wireless transmission， no wires connection is needed.
Theft deterrent locking system.
Convertible pressure unit (Bar / PSI).

General:
Brand: Steelmate
Model: TPMS-A86

Valve-cap sensor specifications:
Operating frequency: 433.92MHz ± 0.05MHz
Operating voltage: 1.8 ~ 3.3V
Operating current: ≤18mA
Static current: ≤1uA
Operating temp.: -20℃～+60℃ / -4℉ ~ + 140℉
Battery model: CR1632
Battery voltage: 3V
Battery Life: ≥2years
Package size: 15 * 10.5 * 4.5cm / 5.9 * 4 * 1.8in   
Package weight: 227g / 8oz

Package List:
1 * Display
4 * Valve-cap sensors
1 * Set of Accessory
1 * Manual