PALO ALTO, Calif. — Nest Labs Inc. has issued a consumer safety notice for its Nest Protect smoke and carbon monoxide detector after recent laboratory testing showed the Nest Wave feature, which enables the user to turn off the alarm with “a wave of the hand,” could be “unintentionally activated,” causing a delay in the alarm going off in the event of a real fire.

In a letter to the Nest community, Nest CEO Tony Fadell said the company feels “the best and safest thing to do is to immediately disable the Nest Wave feature to resolve the issue and remove any safety concerns,” even though they are “not aware of any customers who have experienced this.” In the meantime, Nest has halted sales of all new Nest Protect alarms “to ensure no one buys an alarm that needs an immediate update.”