Adopt super capacitor to provide stable and reliable for protection. Protect battery from overcharge, overdischarge and short circuit. With balance function to prolong battery life. Gone through load and aging test for quality assurance. Small volume, easy to mount Maximum charge voltage: 3 V (monomer) Maximum charge current (A): unrestricted (this current is related to the discharge current of the super capacitor) Maximum discharge current (A): unrestricted (this current is related to with the discharge current of the super capacitor) Minimum discharge voltage: 0.1 V Monomer balance starting voltage: 2.65 V Voltage balance of the error start: + 0.25% Single balanced start presentation: red LED lamps temperature range: -40 to 85°C Storage temperature range: -40 to 85°C 5 string: 360F, 400F, 500F, 650F, 700F Colour:Green Material:PC Package Contents: 1 x Protection Board(Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.