Purchased December 28, 2025, opened, and tried only once. I am selling it because I have a similar item. The serum is unopened. Returns and exchanges are not accepted. From the official website: LED is a safe light also used in light beauty treatments at aesthetic clinics. The length of penetration varies depending on the wavelength (color) of the light, with blue being shorter and red being longer. The FACE mode is equipped with blue-green LED, and the BODY mode is equipped with red LED. Point 1: "Wide Lift Head" with 7 three-dimensional & curved electrodes that fit the skin and are easy to lift. Point 2: A new sensation of tapping in a wave-like motion. Point 3: Warms the skin from the epidermis to the deep layers. Dual heater function Lift up Ya-man Ya-man YA-MAN Liftology SP/YJFD2 Features: EMS Area: Face Care: Lift up Area... Whole body, Face Care: Lift up Area: Face Features: LED/Light Ya-man Lift Care Specialized Beauty Device Liftology SP YJFD2PH Brand: YA-MAN Ya-man Liftology SP YJFD2L YJFD2PH Brand: YA-MAN Ya-man Lift Care Specialized Beauty Device Liftology SP YJFD2L Blue Brand: YA-MAN Type of beauty device: EMS beauty device, light beauty device For home/professional use: For home use Beauty device functions: Waterproof, splash-proof Areas: Face, Arms Power supply: Rechargeable Charging time: 3.5 hours Weight (g): 206.0 g