Features: This multi functional wireless emergency call wristband integrates hospital alert, elderly care, and school safety features for reliable emergency assistance. Featuring a lightweight straps, and waterproof casing, it ensures all day comfort for active users. Ideal for seniors requiring fall detection, children needing campus security, and medicals staff managing patient care through wireless nurse call systems. Perfectly serves hospitals requiring quick patient nurse communication, families monitoring elderly members, and schools implementing emergency alert protocols. Engineered with shock resistant housing, this wearable alarm bracelet maintains reliable performances in rainy conditions or accidental impacts. Specifications: Component:Plastic Working voltage: DC3.7V Working frequency:433.92MHz Standby current:10±5mA Working current:75±10mA(vibration) Receive sensitivity:-107±2dBm Battery Capacity:300mah Size:Approx.60x14x40mm/2.36x0.55x1.57inch Package Includes: 1 Set Watch Receiver note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.