Applicable Battery: Li-ion,Automatically Recognize 7S-14S Highly integrated built-in Bluetooth, ultra-high precision real-time monitoring 5000W ultra-high power TVS to resist high current shock,Designed for high current - new TOLL package with ultra-low internal resistance Smart APP can check parameters and battery status at a glance,Multiple protection values including overcharge, over discharge, over current, temperature, balance, etc Product name:Lithium battery protection board model:JBD-SP17S005 size:102x65x12mm Applicable products:iron lithium Cell voltage:3.2V Features:Good heat dissipation, high cost performance The product appearance and printed words may vary depending on the batch, but this does not affect use. Specification: 30A/40A/20A Colour:As Shown Material:PCB Package Contents: 1 * Li-ion Balanced Board 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.