eross 600Mbps USB Wifi Adapter, Dual Band (2.4GHz/150Mbps & 5GHz/433Mbps )802.11 a/b/g/n/ac Antenna Network Wireless for PC Laptop, Support Windows XP/Vista/7/8/8.1/10, Mac OS X 10.4~10.13 100% Brand New and High Quality With compact portable design Used to monitor the storage-battery voltage With reverse connection protection function (if the wire is reversely connected, the will not be burned to damage.) Material: ABS, LED Digital display