Features: Applicable to: America. Support 4G frequency, 700mAh battery, IP67 waterproof, SOS calls for help. You can locate the user's specific location by mobile phone or computer. Mark an area on phone map with the equipment as the center, and call immediately when you leave the area. In case of emergencies, press the SOS, that is, send a call and information to your defender. Specifications: Material: Plastic Size: Approx.6x3.3cm/2.36x1.30' Package Includes: 1x Locator note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.