Parameter: Charging Voltage: 8.4V-9V; Overcharge Voltage Range: 4.25V-4.35Vplus or minus 0.05V; Overpressure Voltage Range: 2.3V-3.0V plus or minus 0.05V; Upper Limit Operating Current: 8A Size: 41 x 8 x 2.2mm/ 1.61 × 0.31 ×0.09inch (L x W) Protection: Overcharge Protection; Overdischarge Protection; Short Circuit Protection; Overcurrent Protection. Wiring Instructions: B+ : Connected to the battery positive; B- : Connected battery negative; P+ : For the battery pack output input positive; P- : For the battery pack output input negative Package Content: The package comes with 10 x 2S 7.4V 8.4V 8A Lithium Battery Protection Board, 1 x Nickel Strip 1 Meters Description:
Charging Voltage: 8.4V to 9V
Overcharge Voltage Range: 4.25V to 4.35Vplus or minus 0.05V
Overpressure Voltage Range: 2.3V to 3.0V plus or minus 0.05V
Upper Limit Operating Current: 8A
Upper Limit Instantaneous Current: 16A
Quiescent Current: less than 10uA
Internal Resistance: less than 300m ohm
Size: 41 x 8 x 2.2mm/ 1.61 × 0.31 ×0.09inch(L x W x H)

Wiring:
B+ : Connect to battery positive.
B to : Connect to battery negative.
MB: Connection point between battery 1 and battery 2.
P+: Positive pole for charging/discharging (common at charging/discharging end).
P to : Negative pole for charging/discharging end (common at charging/discharging end).

Note:
The product must be connected to a 8.4V charging voltage through p+ and p to before it will create voltage on pads.Or you can activate this BMS by momentarily shorting b to and p to

Package Included:
10 x 2S 7.4V 8.4V 8A Lithium Battery Protection Board
1 x Nickel Strip 1 Meters