Features: Universal Fit: most of strollers, prams, and buggies. Equipped with a versatile carabiner that accommodates various strollers types. Intelligent Shaking Technology: Built-in high-precisions sensor simulates natural shaking frequency of the mother arm, effectively improving the baby sleep speed by 30%. Quiet Operation System: adopts very quiet motor, and the operating noise is less than 25 decibels, ensuring that it will not disturb the baby stable sleep. It is very suitable for night and sleep time. Portable Design: Lightweight structure, with a total weight of only 0.48kg, convenient to carry and install. Safety Materials: food-grade silicone and the contact part with the baby is soft ensuring the safety of use. It is suitable for use at home, outdoor or when traveling, and provide a comfortable sleeping environment for the baby anywhere. Specifications: Materials: ABS+Metal Size: Approx. 16.5x9cm/6.5x3.54in Package Includes: 1Pc Strollers Pram Rocker note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.