Abstract: A modular safety device has an ultrasonic device capable of transmitting ultrasonic sound with a frequency of at least 20 kHz. The ultrasonic sound is inaudible to human ear and can cause barking or approaching dogs to stay in place, stop or move away from the user. The modular safety device also includes a power supply and an audible alarm device. The audible alarm device is capable of issuing a distress sound audible to human ear. The power supply, ultrasonic device and audible alarm device are incorporated into a detachable and portable unit that can be easily carried on a user's person or attached to a user's mobile device such as walker or wheelchair.

Abstract: A multifunctional walking stick includes a telescopic stem having an adjustable handle and an interchangeable base. A modular safety device is detachably attached to the stem. The modular safety device includes a dog deterrent device, an audible alarm device and a location tracer device. The dog deterrent device can issue inaudible ultrasonic sound to deter barking dogs from a user. The interchangeable base can receive different selectable base bottoms for different activities i.e. walking, hiking, etc. The multifunctional walking stick also includes a compass, a flare compartment and a shock absorber for reducing vibrations caused by a walking surface.