Key body: stainless steel, full metal construction, compact and durable. Spacing adjustability: The distance between the key faces is adjustable and can be set to the position that matches personal habits. Connection: 3.5 mm socket. Base and mounting: The base consists of three neodymium magnets that can be easily attached to iron objects such as radio cases and car covers to facilitate outdoor platform construction. Use scenarios - Field setup for portable equipment: Use the magnetic base to attach the unit to metal surfaces on a radio case or a vehicle, then connect accessories via the 3.5 mm socket for quick, on-site operation. - Workshop compact mounting: Mount on metal tool chests or cabinets in a laboratory or workshop for a lightweight, durable control point that remains stable during use. - Outdoor experiments and demonstrations: Place on metallic surfaces at an outdoor site (for example on a radio enclosure or a car body) to enable rapid deployment of a compact platform without drilling or permanent fixtures.