Compatibility: Microsoft Surface Pro X/9/8/7/6/5/4/3 Surface Laptop1/2/3/4 Surface Go 1/2/3 & Surface Book 1/2/3
*15V/4A 65Wpower is special for device Microsoft Surface Laptop，Surface Book Tablet
*This charger has over heating protection and short circuit protection
*Genuine cable and pin can be used to provide consistent charging
*With 5V/1A USB port, you can charge your tablet and cellphone at the same time

Fully Compatible With The Following Models:
Surface pro 7
Surface pro 3
Surface pro 4
Surface pro 5
Surface pro 6
Surface pro 7
Surface pro X
New Surface Pro
Surface Laptop
Surface Laptop 2
Surface Laptop 3
Surface Go
Surface Go 2
Surface Book
Surface Book 2
2018 Surface Pro 6, i5 8250U / i7-8650U
Surface Laptop, 2017, i5 7200U / i7 7660U
Surface Book, 2015, i5-6300U / i7-6600U / i7-6600U
2017 Surface Pro 4, Surface Pro 5, 2017, m3-7Y30 / i5-7300U / i7-7660U
Surface Pro 4 Tablet, 2015, m3-6Y30 / i5-6300U /i7-6650U
Surface Pro 3 Tablet, 2014, i3-4020Y / i5-4300U / i7-4650U

Specifications:
Input(AC):100V-240V 1A 50/60Hz
Output: 65W 15V 4A / USB port 5V 1.5A
Power Supply: 11.1x 5.55x 3.0 4.37x 2.18x 1.18 inch
Power Cord: 3.93Ft
DC Cable: 3.93Ft
Weight: Power Supply : 185g (6.52 ounces)

Attention:
*Don't expose to liquids
*Don't disassemble
*Avoid dropping
*Avoid extreme temperatures

It is normal that has certain temperature increasing during use.