... Host and spare parts(1) Host: 1 piece(2) RF pen: 1 piece(3) Adaptor: 1 piece(4) Cold ... acceptance range3. During operation, be sure RF head along skins firmly , keep pen vertical to skin, no tilt.4 ... gel while treating, so that the head of pen could touch skin tightly and operating smoothly5. While ... force slight, intensity should be weak, head of pen touch skin slightly too.6. Each treatment part could ...