VOCA CP141 is a 4G smart system, basically equipped with an elderly 4G home wireless phone and a waterproof SOS wristband for emergencies, which can be connected to up to 10 sensors. It serves as a smart system to protect seniors living alone. Product Features: - Supports 2/3/4G Nano SIM cards, eliminating the need for additional landline phone charges. - Can connect up to 10 sensors/buttons (door/window, water leakage, gas, PIR sensors, and various doorbells/buttons). - Sensors can be quickly paired with three keys. - Waterproof SOS wristband providing emergency help functionality in the bathroom and kitchen. - Three one-touch photo speed dial keys with replaceable photos. - Can function as a Wi-Fi hotspot to provide internet for other devices. - Supports hands-free calls and microphone voice amplification. - Blacklist and whitelist design effectively prevents scam calls. - Extra large buttons, loud ringtone, LED indicator light. - Supports multiple languages and Cantonese keypad pronunciation. - One-touch radio on/off switch. - Uses Type-C power supply with built-in backup battery and low battery alert.