Hikvision

DS-ps1-E-WB Red 433 MHz two-way wireless communication 3 years battery life span (triggered every two weeks and alerting 90 s for each triggering) AES-128 encryption Front and rear panel tamper-proof...

Wireless Emergency Button features dual-trigger activation, app-based remote configuration, anti-jamming frequency hopping, IP66 waterproof protection, and easy installation with flexible enrollment...