2 PCS Electronic Accessories: 1 x Expansion board & 1 x 20A PWM DC Motor Speed Controller 12V 24V 36V 48V /w Potentiometer Knob Switch ca<br> Compatible With: Micor:Bi<br> Accessory Type: Extension Board<br> 5V 1A power supply for greater driving force<br> 3.3V and 5V power interface<br> Input voltage: DC10-60V<br> Output voltage type: Load Linear<br> Output Current: 20A<br> Continuous power: 1200W<br> Speed Type: adjusting flow<br> Speed mode: potentiometer (linear)<br> Speed range: 0 - 100%<br> Control frequency: 25KHZ<br> Connection Type: Barrier Terminal Block<br> 3.5mm audio connector<br> 5 gold fingers<br> Builtin buzzer (switch switching)<br> Yellow and black differentiated 3PIN interface<br> 5V 1A selfrecovery fuse<br> colour:black+green<br> Material:ABS+PC+ metal<br> size:<br> Expansion board: 56 x 44 x 12mm<br> Module size: (L x W x H) 77MM x 45MM x 28MM<br> Board Mounting size: (L x W) 73MM x 40MM<br> Potentiometer installed opening hole size: 7MM<br> Knobs Cord length: 20CM<br> Package Contents:<br> 1 x Expansion board<br> 1 x 20A PWM DC Motor Speed Controller 12V 24V 36V 48V /w Potentiometer Knob Switch ca<br> Only the above package content, other products are not included.<br> 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.