and high quality. Fine workmanship and perfect style. Easy to install and in use. Lithium battery modification accessories Quantum 36/48V/52V 12 tube KT-35A sine wave controller waterproof connector must be used with Quantum instrument Warm Tips: Please make sure your controller is KT controller (communication protocol) before using on your device. KT controller is only suitable for KT series accessories, such as KT display. Type: KT35A fully waterproof controller Rated voltage:36V/48V/52V Low voltage protection:DC30/40±0.5V Field effect transistor:12 tubes Current:35±2A Rated current:17A Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Color:Black Material:Metal Package Contents: 1 * Electric Bike Controller 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.