Emergency call bracelet for Swissvoice C50s for numbers pre-saved in C50s phone, it is perfect for constant use thanks to the waterproof construction. You can even keep it on even while bathing or showering. Specifications Waterproof Battery life: 3 years Range: up to 10 meters Necklace included Dimensions: D 2 x W 8 x H 14 cm Colour: Black/Red