Set includes: powerful multi-speed stimulator; superior silicone pinpoint probe with curved base for comfort and fit; solid silicone beaded probe with retrieval loop. Slip stimulator into retrieval loop of beaded probe for reverberating vibrations. Probe measures 4.75 in. by 1 in. Beaded probe measures 4 in. by 1 in. Probe with ring measures 3.5 in. by 1.5 in., ring diameter 1.5 in. Stimulator requires 2 AAA batteries, not included.