PowerG Wireless Digital PIR Detector. Two-way wireless digital PIR detector. Range: 15m (50ft) 90o multiple-curtain coverage with 'wall' creep zone. Transmission range is far greater than the industry standard - enabling repeater-free installations even in large premises. Longer battery life (6 years in typical use). Visible signal quality indication shown on the device. Enhanced false alarm immunity by combined Fresnel and cylindrical optics. PowerG two-way Frequency Hopping Spread Spectrum FHSS-TDMA technology - provides robustness and reliability closer than ever to wired systems. Employs the proven AES-128 (128 bit key) advanced encryption algorithm for correct message identification and for protecting the alarm system from code grabbing other attackers. Continuously measures communication quality and automatically sets transmission power to the minimum required for reliable communication. Configured from the panel – no hardware switches and no need to re-open the detector once closed. Visible and transmitted low battery indication. Fast and easy adjustment-free installation.