Features: Quality printed circuit board materials with guaranteed quality. Stable performances and long service life. Suitable for 1104 1106 1306 1407 1503 brushless motor. Miniature design, very lightweight, can be used anywhere. This electronic controller can be used to make brushless fan, model aircrafts, UAVs and other products, and is also very suitable for DIY enthusiasts. Specifications: Material: Printed Circuit Board refer pictures to selection please Size: approx. 20x7mm/0.79x0.28inch Product Name: Brushless ESC Drive Board Without Battery Elimination Circuit Supports 1-2S batteries Voltages: DC3.7V-8.4V Current: 4A Support for 1104 1106 1306 1407 1503 brushless motor Fit for: 1104 brushless motor 1S battery 5inch paddles 2S battery 3.5inch paddles 1106 brushless motor 1S battery 5inch paddles 2S battery 4inch paddles 1306 3000KV 1S battery 5inch paddles 1407 1406 1503 1S battery 5inch paddles 1806 2000KV approximately 1S battery 5inch paddles Package Includes: 1Pc Brushless Motor Driver Board Module note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.