Description The alarm needs 3 AAA alkaline batteries (including) for standby for 6-10 months. The remote controller needs a 12V / 27a alkaline battery (including) for more than 1 year. Adopt three-dimensional displacement sensor and special algorithm to more accurately identify theft and reduce noise interference. Two methods of double-sided stickers or ties are convenient for anti-theft of various vehicles and batteries. It is better not to install the host in a closed space surrounded by metal which has great influence on the wireless signal Shielding affects the remote control distanceFeatureControl Distance: Remote operation distance of remote control: 0-66 feet (20 meters).SOS function: Turn on the SOS help function and the help prompt tone will be automatically sent out in ? ? case of riding accident to give you multiple guarantees.Volume: 113dB high volume part can also effectively deter thieves!Volume: There are three levels: high medium and low. The factory default is the highest sensitivity and ? ? ? maximum volume.Touch sensitivity: There are seven levels from high to low with seven tones do Le Mi FA So La Si sound Origin:CN(Origin) Smart home platform:NONE Alarm Type:The Alarm Connection Type:wireless Arming Type:FR Remote-controller Certification:CE Model Number:SF22R Bike Alarm Feature1:Bike Alarm Feature2:Bicycle Alarm Feature3:Anti Theft Vibration Detector Sensor Alarm Feature4:Anti Lost Feature5:Wireless Remote Control Feature6:Waterproof IP55 Feature7:113dB Loud Feature8:Security Protection Feature9:Electric Car Alarm Feature10:Alarm Automotive Feature11:Motorcycle Alarm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.