Wireless PIR Alarm & Wireless External Siren

Features: * 433.9MHz or 315MHz radio frequency * Sphere-crown PIR movement detector, with detection range approx. 6 meters at 90篴ngle * Up to 15 meters operation range (in open space) * On-the-spot alarm with high pitch up to 100dB * Low power consumption with approx. 6 months battery life * Audio notification for low battery