Product specifications: - AC input: 100V to 240V. - DC output: 5V/1.0A. - Power: 5W Max. - Cable length: 3.3ft / 100cm. - Plug hole(outside diameter x inside diameter): 5.5x2.5mm, also compatible with 5.5x2.1mm - DC connector polarity: central positive(+) - Replacement Plug Head Code: A-3.5*1.35mm, B-4.0*1.7mm, C-4.8*1.7mm, D-5.5*1.7mm, E-5.5*2.1mm, F-5.5*2.5mm, G-6.3*3.0mm, H-6.4*4.4mm Where I use it? - High quality generic Home/Travel/Wall Charger for your 5.5*2.5 mm plug device. Why I choose it? - Small and lightweight for convenience, portability and storage. Easy to take anywhere! - High efficiency and low energy consumption. - I/C Chip Technology To Protect Your Device: Over Voltage Protection, Over Heat Protection,Over Current Protecion. How to use it? - Get it and plug it to the socket. Package included: - 1 x AC/DC Adapter Power Charger - 8 x Replacement plug head IMPORTANT NOTE: In order to get the right adapters, please check the device before your purchase: 1) The correct connector type needed for the device? →The connector type of the adapter should match the port on your device. If you’re unsure about the connector type, refer to the user manual or measure the size of the DC port on the device by a ruler. For example, this 5v adapter is fits for the DC port measured 5.5mm in diameter. 2) The polarity, the level of voltage and rate current needed for the device? →Check the device’s product label or user manual to see its polarity,rated voltage and current. These are usually expressed in positive (+), volts (V) and milliamps (mA) or amps (A). For example, a device might have an input rating of 5V 1A and symbol of (+), which means it needs central positive(+) 5 volts and 1 amps of power to operat