1、FOR SMALL DEVICES: Suitable for small electronic devices and other devices that use a 5.5mm barrel jack as power cord 2、DURABLE COPPER TERMINALS: These DC converter connectors are made of good quality durable materials. Such as copper terminals, hand soldering process and 5000 cycle testing 3、POWER EXTERNAL DC DEVICES: USB to M type 5.5mm power cable allows you to power external 5V DC devices, provide great convenience 4、PERFECT FOR MOBILE APPLICATIONS: The USB to DC plug cable is the perfect solution for mobile applications, eliminating the need to pack a wall adapter for charging 5V devices 5、CONNECT FROM USB PORT TO DC PLUG: This product enables you to connect the device from the USB port to the DC plug, eliminating the need to carry or store power adapter