Features: Output short circuit-protection. Real test of aging, high safety-performance. Low working temperature and long service life. This adapter is very small and beautiful, making it for ideal-to carry with you on trips or to use in the home or office, which solves the trouble of carrying various charging cables when going out. You can connect with the power adapter, car adapter, power banks, laptop and so on, those charging method-can provide high efficiency and high stability charging experience for you. An for ideal-solution to charge and sync watchs by a micro usb adapter, saving the trouble of carrying for-extra cable around. Minimum design, no additional drivers or installation required. You can connect with the power adapter, car adapter, power banks, laptop and so on, those charging method-can provide high efficiency and high stability charging experience for you. Specifications: Material: Plastic- Size:Approx.4.1x1.1x0.7cm/1.61x0.43x0.27inch Color:Black For Polar Pacer/Pacer Pro 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 difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Charging Adapter