Specification:
Brand: NEO
Model: DN20
Power：DC 5V/2A
Backup battery：AA(1.2v) x 3pcs Built-in Ni-MH battery with 2600mAh capacity, rechargeable battery.
Valve open/close time：12 seconds
Copper Tube Diameter：DN20
Screen：LCD
Water flow reporting accuracy：0.1gaL
Flow rate reporting accuracy：0.1gal/min
Operating water pressure：0～1.3 MPa
Working temperature:1 ～ 60℃(34 - 140℉)
Working humidity:1 ～ 95%RH
Wireless Frequency：2.412～2.483GHz / 5.18～5.85GHz
Wireless Standard：IEEE 802.11/b/g/n；IEEE 802.11a/11n/11ac
bluetooth Version：bluetooth 5.0
Wireless Distance：45M
Waterproof level：IP66

Features:
1. Support bluetooth network;
2. Support 2.4GHz/5Ghz dual-frequency signal, wireless distance 45 meters;
3. Support local switch control;
4. Support bluetooth control when disconnected from the network;
5. Support device linkage;
6. Screen display real-time flow rate, flow data;
7. Support APP remote control valve switch;
8. Support multi-unit switching gal, m³, L;
9. Support sharing, can be viewed by multiple people;
10. There is a built-in backup battery, in the backup state of the record flow to save the local, and at the same time can be emergency switching;
11. Support flow statistics, view total water consumption.

Backup battery function:
1. Battery backup, requires external power to activate internal power;
2. When disconnecting the external power, the WiFi will automatically turn off, can not be controlled remotely by APP, only through the local control of the valve open/close;
3. Cannot locally control valve open/close when battery voltage is below 3.8V. When the battery voltage falls below 3.5V, it will automatically close the valve and shut down the machine;
4. In the mode with battery backup, the indicator light for opening/closing the valve will flash once after 10 seconds;
5. Wake up the MCU at one-minute intervals while the valve is open, and wake up the WiFi uplink if the DPpoint changes.