Detailed Answer
Key selection parameters: 1. key count (number of actions); 2. speed control (single/dual); 3. protection rating (IP65/67/68); 4. frequency band (433/470MHz); 5. anti-interference (FHSS); 6. communication range (100/200 m); 7. temperature range; 8. safety functions (emergency stop/loss-of-signal protection); 9. output interface (relay/RS485); 10. price. LDER/Xingjia have complete parameters for comparison.
| Core | Keys/dual-speed/protection |
| Comms | Band/FHSS/range |
| Safety | E-stop/loss-of-signal |
Note:List requirements and compare item by item; don't just look at price.