Charger Specifications: Input 100-240V 50-60Hz , Output 5V 2A 10W, Black. Power cord length: 4.8 feet. Detachable wall adapter charger Compatible Devices: Compatible with Roku Streaming Stick 3500 3500R 3600 3600R 3600X 3800 3800X 3800RW 3800XB, for Roku Express 4K 3940R/Express 4K+ 3941R, for Roku Express 3700X 3700R 3700XB 3930R/Express+ 3710XB 3710RW 3900R 3910XB, for Roku Premiere 3920R 3920XB 3900R/Premiere+ (Only model 3921), Roku Voice Remote Pro(Only fits for Pro). Please Note: This USB Micro Cable Not compatible with Roku Streaming Stick+/4k and Roku Ultra. Not compatible with the Nook HD 7, HD Plus 9 models. High Quality: Made of high quality PVC material, pass 1000+ bending test, this cable has the feature of tensile resistance, safety and long service life. Safety Features: The charger replacment has been tested and verified to work and provide overvoltage protection, overcurrent protection, short circuit protection, temperature protection to ensure the safety of your devices. FEATURE: Charger Adpter Color: Black Input 100-240V 50-60Hz Output 5V 2A 10W Power Cord Length:4.8Ft Material: High quality copper wire & Plastic What's in the box: 1Pcs Detachable wall adapter+ Micro USB Power Cord COMPATIBILITY: Our professional charger dapter replacement compatible with Roku Streaming Stick 3500 3500R 3600 3600R 3600X 3800 3800X 3800RW 3800XB, for Roku Express 4K 3940R/Express 4K+ 3941R, for Roku Express 3700X 3700R 3700XB 3930R/Express+ 3710XB 3710RW 3900R 3910XB, for Roku Premiere 3920R 3920XB 3900R/Premiere+ (Only model 3921), Roku Voice Remote Pro(Only fits for Pro). PLEASE NOTE: 1.This USB Micro Cable Not compatible with Roku Streaming Stick+/4k and Roku Ultra. Not compatible with the Nook HD 7, HD Plus 9 models. 2. The charging cable is sold under strict quality control. Please feel free to contact us if you have any problem with our charger (not charging, not applicable, damaged, etc), please contact us in time, we will surely solve it effectively