MrThakur Whatabout English?

MrThakur whynot?

MrThakur Ask the company and not to the visitors/buyers.

MrThakur Disassemble first layer of back cover including top cover. On the top of the video door bell, there are micro USB and SD card slots.

MrThakur Four mechanical OF-OFF switches (relays) controlled by a digital electronic circuit:Well, simply its a WIFI Controlled (four channel) Smart Switches [(relays), (i.e. Four ON-OFF switches)] and applicable up to 250V, 10A electricity respectively (replacing four manual switches), whose Cutover voltage 250V and or Cutover current 10A respective to the switches.However, the above smart switch is controlled by a digital circuit whose working voltage USB 5V or DC 5V, said digital circuit (irrelevant to an user) that makes said four channel Switches ON or OFF respectively, as per setup of the program in the app.) Therefore, any digital input (in the circuit board) is not relevant to an user of the Smart Switch and Key1, Key2 etc. is matter of the digital circuitry (irrelevant to an user like you) that controls the Smart Switches (relevant to an user like you.)

thakursn It is a SPDT relay, means (single pole double throw). Normal principle is that such relay should have 'five pins' in total, 'two pins' are reserved for the 'coil' - input and rest 'three pins' acts as a 'switch' of which 'one pin' is "common" (generally input) and remaining 'two pins' of which 'one pin' is - normally connected (Nc) to the "common" - (means when the relay coil is not energized) and the 'other pin' is - normally open (No) to the "common" - (in same situation-relay coil is not energized). The layout of the relay, since the relay is soldered on a PCB so if you see from the soldered side, you will see three pins are almost in a line (except the middle pin) whereas opposite to these pins the rest two pins of the relay are parallel to the said line. Keep these three pins said (almost in a line, except the middle one) on your left, so on your right will be the rest two pins - these rest two pins are the output of the relay switch i.e. the top pin is No (normal open) and the bottom pin is Nc (normal contact). Normal means when the relay coil is not energized). Therefore the former three pins on your left - the middle one form the input of the relay switch and rest two pins (i.e. top-left and bottom left) are two pins of the coil of the relay - when energized, it Nc (normal contact) opens and No (normal open) contacts.

MrThakur Yes it will work on a local wireless network (LAN or WLAN) through WiFi router without incurring internet charge. But one needs to use internet connected WiFi router or LAN at least for once for the first time to update device software, However, it is necessary to use a microSD card in the camera so that it can record the video it captures. Certainly up to 32GB - may be above GB that I cannot remember now, please confirm.

MrThakur It is not Power Horizontal rather Output Horizontal, meaning there is zero lift of output water, When the input water level is same as out put water lift i.e. horizontal level between input and output water level with the motor.