Shock and vibration data logger with internal or external accelerometer ±15 g or ±200 g - Optional temperature, humidity, air pressure and light sensors, analog inputs to record up to 10 billion shocks, the MSR165 has extremely low power requirements. With a lithium polymer battery (900 mAh), you can monitor vibrations for up to six months, and even five years with the replaceable Li-SOC 2 battery.