Easy to install. 100% brand new. 100% original Walkera brand. High quality and durable in use. Light weight and protable to carry. Made of good and new technology material. Dimensions: 3.15 in x 1.97 in x 1.18 in (8.0 cm x 5.0 cm x 3.0 cm) Weight: 0.20 oz (6 g)