F21-4S 4-Button Industrial Wireless Remote Control for Electric Hoist/Crane — 12V/24V Q400 Single-Speed

Compact, rugged remote control designed for electric hoists, cranes and elevators — model F21-4S (Q400). This 4-button, single-speed transmitter/receiver set supports 12V and 24V systems and is built for reliable operation in industrial settings. Operating ranges: transmitter temperature -20°C to +70°C; receiver temperature -30°C to +70°C, making the unit suitable for a wide variety of climatic extremes. Wireless performance: line-of-sight control distance up to 100 meters for dependable remote operation across large work areas. Environmental protection and interference resistance: transmitter rated IP64 and receiver rated IP65 to withstand dust, water and other harsh conditions commonly found on job sites. Power efficiency: transmitter standby current is under 8µA to minimize battery drain during long periods of inactivity. Security: communications use 32-bit security coding (4300000000) to prevent unauthorized signal interference and enhance system integrity.