Electronic Automatic Floor Spring , Under ground swing door motor

Electronic floor spring Automatic Floor Spring Under ground swing door motor Opening angle:45degree to 135degree l. Opening speed adjustable: 2-6s/ closing speed adjustable:3-6s 2. Work noise:Being smaller than 50 db 3. Hold open time adjustable: 0-30s 4. Power supply: 220 V±10% 50~60 HZ 5. Self-protection safety system: self protection against overheat, overvoltage, overcurrent, obstacle-encountering 6. Rated power: 35W static power: 3W 7. Output power: 12VDC, 0.5A, for