Koogeek Door Window Sensor,Open Smart WiFi Sensor Contact Door Window Sensor Message Alarm,Notification Reminder Alexa for Voice Control, No Hub Required, Replaceable Battary, Remote Control

Simple Battery Replacement If you want to replace the Lithium battery CR2, simply open the front cover of the sensor, no need to remove and re-attach the positioned adhesive,

Upgrade your mountain riding experience with the Ghost e-bike
Velowave Ranger Fat Tire Electric Mountain Bike, Go for off-road Adventures