Features: 1. Built-in smart chip, USB fast charging, energy saving and long standby time. 2. Three frequency settings, outdoor, indoor, sleep, different sound waves to prevent mosquitoes all day long. 3. One-key switching of step and time function, real-time control, labor-saving and practical. 4. Small and light, easy to carry, the silicone strap can be adjusted as needed for comfortable wearing. 5. Pure natural mosquito repellent, whether indoors or outdoors, can effectively repel mosquitoes. How to use: On-screen display button above - time/temperature/step, below the power button - time setting/switch 1. Repellent: Turn on the power button, display 01, the second and third times can switch 02 and 03 modes, the fourth time turns off the power. 2. Time: Press and hold the power button for 3 seconds, set the hour and minute successively, and confirm with the power button. 3. Step: Press the display button twice continuously to display the number of steps, then press and hold for 2 seconds the interface can