1Made of quality material, durable and sturdy, having long service time. 2The energy is precisely focused in the depth of the tissue, which has no effect on the surface skin. 3The probe is used for ultrasound beauty machine, suitable for dermis 4On the one hand, it has a deep effect, and on the other hand, it can better protect the surface skin. 5Easy to install, great replacement parts for your old or broken one.