The Premium Vibrating Portable Door Chime has a vibration function as well as a chime sound and Blue LED alert, making a perfect door alert for the hard of hearing.Choose from three operating modes: sound only, vibration only, or both together; and 8 chime melodies. With an impressive range of up to 100 meters you can carry the chime unit around the house or garden with you. It is also free-standing, or can be wall mounted. The bell push is water resistant and comes with wall mounting fixings.