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 Color: As Shown Material: PCB Package Contents: 1 x 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm