Input Voltage: 100-240V AC,Rated Input Frequency:50/60HZ Product names are trademarks of the listed manufacturer or other owners, and are not trademarks of SOLID-NAILED Corporation. The manufacturer does not necessarily endorse use of these products. Excellent Material: Sturdy flame-retardant exterior shell, Protects against scratches, bumps, drops, withstands pressure and keeps internal components safe during emergencies enhanced longevity. Built-in protection:Wall charge power supply include Over Voltage Protection,Over Current Protection,Short Circuit Protection,Input Protection,all-round guarantee of safe and normal use of power supply. Wide compatibility:AC Power Adapter Compatible with Brookstone Big Blue 200 Large Wi-Fi Bluetooth Speaker CJP-Geek AC Power Adapter Compatible with Brookstone Big Blue 200 Large Wi-Fi Bluetooth Speaker