This 3-in-1 battery discharger can battery pack keeping in condition. This LCD battery discharger tester can instant voltage reading and the LCD screen is . This battery balancer is convenient to use and operate, it has 3 keys. This battery meter is suitable for -Polymer/-Fe battery, and allows 2 to 6 cells balancing and discharging. This battery tester can measure voltage of receiver battery and the big LCD screen can show 6 cell batteries condition Measurable battery type and amount: -Polymer/-Fe 2-6 Cell.(standard voltage 7.4V-25.2V using divided voltage connector) Receiver battery 1.2V-12V DC.(No battery type limit, needs external power 7.4V-25.2V, use JST connector) Balance voltage setting range.(lower limit): 2.0V-3.9V.(-setting value 3.3 V) Discharge voltage setting range.(lower limit): 3.0V-4.2V.(-setting value 3.9V) Colour:black Material:plastic Package Contents: 1 x Battery Balancer 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.