8.4V 1A Power Adapter Li-ion Battery Charger--Output 8.4V 1A 8.4W,input voltage range AC 100-240V 50-60Hz 0.5A Max，Charger body dimensions: LxWxH 2.68in*1.65in*1.26in Charging Compatibility--Only charging for 7.2V~8.4V motorized shades or 2-String Lithium Battery Pack, Cannot be used for 12V devices.Not compatible with original smart curtain motors from brands such as Graber, Bali, or Somfy. Please verify your device model before purchasing. Charging Status Indicator--Power Cord Length:10 Feet/ 3 Meter, be able to plug it on different outlets. The LED indicator shows red during charging and turns green when fully charged. This helps you monitor charging progress and prevent overcharging. If the light does not turn on, check connections and power source. 3.5x1.35mm Male Interface Connector-- 8.4V 1A lithium battery power charger, do not compatible with other sizes (4.0*1.7mm, 5.5*2.1mm), How to charge--Indicator appears red when your device is during the charging. It appears green,when the battery pack is fully charged