1Using three-dimensional displacement sensor to identify theft, more accurate identification and reduce noise false alarm. 27 level adjustable sensitivity, ensuring your bicycle safer. Suitable for installation in a various environments. 36 kinds of alarm sound are arbitrarily selected, 113dB loud sound can effectively play the role of anti-theft. 4Open SOS help-seeking function, automatically send out help-seeking sound in case of riding accident, and give you multiple safeguards. 5PC shell, more solid, IP55 waterproof and dust-proof, more suitable for outdoor use.