[Charging current] 20 A; USB output: maximum 5 V/2 A; Battery voltage: automatic identification 12V/24V; dimensions: 133 * 70 * 35 mm; weight: 132 grams. Lead-acid batteries: OPEN, AGA, GEL. 【Safety protection】Built-in short circuit protection, open circuit protection, reverse polarity protection, overload protection. It has complete 3-level PWM load management. [Function] Build an industrial microcontroller. Charging and discharging parameters are adjustable. You can set the charging operation mode. 【Heat Dissipation】Double MOS reverse current protection, low heat generation, low failure rate. Extends battery life and reduces operating load. 【Easy to Use】The LCD display clearly shows the status and data, easy to set up and use. Suitable for home, commercial, industrial use and more. Neutral English packaging box dimensions: 13.7 * 7.7 * 4 cm Weight of the entire box 160 g Instructions in Chinese and English. No batteries, no magnetism