• High-quality flexible wire core as a guide line, with high elasticity metal contact blade as a switch, durable without deformation. • Double-layer design on the key, micro-convex structure for easy pressing, with forward sliding and easy push to place in position. • 90 cm long shutter release line, lightweight and with good stability, easy to carry, recommended for night sessions, products, advertisements, and commercial photography. • Internal use of metal reed contacts, minimal contact resistance, high conductivity, and wear resistance. • Camera shutter release support for focus, shutter release, and bulb shooting, lightweight and portable.