With its innovative battery-free design, this telephone ring amplifier is the perfect addition to any home or office. Its sleek and modern white exterior is both stylish and practical, making it a great tool for any telephone user. The adjustable volume feature ensures that you never miss a call, even in noisy environments, making it a versatile and practical tool for any telephone user. Features -Color:White -Material:PP -Size:9.70X5.70X2.50cm/3.81X2.24X0.98in -Amplifies telephone ring to ensure you never miss a call, even in noisy environments: enhances the volume of the telephone ring to ensure that you will never miss a call, even in loud surroundings. -Stylish and modern white exterior complements any home or office decor: the sleek and contemporary white exterior perfectly complements the aesthetic of any home or office. -The ability to adjust the volume enables you to adjust the sound volume according to your preferences. -Compatible with all types of telephone systems: can be used with any kind of telephone system. -Battery-free design for easy use: designed without the need for batteries to ensure convenient and trouble-free usage. Package list: 4 x Telephone Ring Amplifier