About this item Compatibility: Foam tips compatible with various Bluetooth headsets; comfortable, and secure in-ear fit; and offers a superior sound experience. Comfort: Custom fit for all-day comfort; body-heat activated memory foam that adapts and molds to your ear for a completely customized fit and hours of comfortable listening. Quality Sound: Superior sound; block unwanted noise. Included: In ear tip adapter & 3 Memory Foam Ear Tips. Dimensions: 5.24 x 4.45 x 0.98 inches.