1. Intelligent control of battery charge and discharge;2. You can set the charging and discharging time;3. With serial communication function, in the real-time monitoring of the relay working status through the serial port;4. Additional output signal, when the relay meets the conditions, output high, other devices can be controlled.5. And the function of emergency stop keys (stop button), with reverse protection, the reverse does not burn. Working Mode:Voltage limit: UL1, lower voltage limit nL1, voltage limit is lower voltage limit (UL1 nL1)U-1: charge measurement: when the measured voltage is lower than the lower limit voltage, the relay pulls above; Limit voltage, relay is disconnected. U-2: charge measurement time control: set charging time (OP); When the measured voltage is lower than the lower limit voltage, the relay will pull and then start counting down time, timer, relay off; When the measured voltage is higher than the limit voltage, the Relay is disconnected. U-3: discharge detection: when the measured voltage is lower than the lower limit voltage, the relay is off, above the granite voltage, the relay pulls; U-4: discharge detection time control: set discharge time (OP); When the measured voltage is higher than the limit voltage, the relay will pull and then start counting down time, timer, relay off; When the measured voltage is the lower limit voltage, the relay is disconnected; U-5: voltage in range, relay pulling: when measured voltage between lower and lower limits, relay pull, other open circumstances; Color: BlueMaterial: PC+MetalPackage Contents:2 x Battery Charger Discharge Control SwitchOnly the above package content, other products are not included. Note: The light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.