Feature:1.Advanced program design, quick & good performance on movements.2.PA transmitter housing, water/shock/dust proof.3.Single-row button transmitter, compact and lighter design, ensure safe & convenient operation.4. Random security code up to 4.2 billions sets.5.Receiver with 4-LED indicators, quick, simple judgement for operation status & after-service repair.CUPID Q200S 2 steps, (6) 2 step-button + (1) light button (toggle/latch).