Compatibility: This charger is specialized design for Samsung Galaxy Watch R800/R810/R815. ATTENTION: Please NOTE: NOT charge for Galaxy Watch Active/Active 2. If you need one for Active/Active 2 Watch, please just search B07RQRPRJF". Could not be used with fast charger adapter Power Protection Inside (PTC): Keep your Samsung Galaxy Watch safe from over-current or over-charging when connected the power source. If you plug the charger after blue and green light flashed, there is no smartwatch the light isn't on Portable Design: Compact and lightweight design, convenient for travelers and business users. Make your Smartwatch charging become more convenient Easy to Use: Easy to know the charging status with LED Indicator and the charger came with a USB Cable only for Galaxy Watch Smartwatch.