... , very safe, more easy and convenient to operate, etc.The wireless data module has a stable working frequency and reliable function as the ... as well as FCC15.249. Comply with the requirement of wireless management, no need to applicant the license of frequency using ... .889 /8.88 9/10 Life span: 100,000 hoursCommunication: wireless remote controlViewing Angle: 140° for indoor models, 110° for window ...