Many use batteries—commonly 3 AAA (required and not included)—while other models use a wind-up music mechanism.
Typical lullabies listed include Brahms' Lullaby, Twinkle Twinkle Little Star, and Rock-a-Bye Baby.
Many listings recommend them for infants aged 0–6 months.
Music commonly plays for about 20 minutes; several listings note an automatic shutoff after that period to help preserve battery life.
Plush parts are commonly polyester or velour, and some models combine plastic components with polyester plush.
Care details commonly recommend spot cleaning or wiping the mobile as needed.
Heights commonly appear around 27–29 inches, and weights are typically about 1 to 1.5 pounds.