The product is connected to the Internet through the router 2.4G wifi, the internal network is directly transparent, real-time communication, and there is an external network server, so as long as the network status is connected, and the distance is unlimited, you can control and view data. Customers please download in G-oogle market, search for 'sinilink' to download App interface can add multiple devices, support A-ndroid system and I-O-S system. Type: A: With connection to WiFi function B: Without WiFi connection function Product parameters: Input voltage: DC6.0-55V (extreme low voltage 5.5V, extreme high voltage 60V) Output voltage: DC0.0V-50V Output current: 0.000A-8.100A Output power: 0-400W Typical output ripple: App-150mv Voltage resolution: 0.01V Current resolution: 0.001A Voltage accuracy: 0.4% Current accuracy: 0.5% Capacity: 0-999999AH Energy: 0-999999WH Size: 78*39mm Hardware protection: input anti-reverse connection for protection, output short-circuit for protection, short connection will not burn out Software protection: over voltage for protection (OVP), over current for protection (OCP), over power for protection (OPP), over temperature for protection (OTP), input under voltage for protection (LVP) Note: Do not connect this product to AC use