Top safety standard: This item has passed strict safety tests, meaning its components and quality meet the national gold standard for electricity product safety Fit for Sharper Image model 1011666 1013983 1013985 2437599 1014392 2313786 2316222 1013002 1012667 massage gun for flexible and reliable use [It won't charge your device if it needs power over 0.8A] 12-month manufacturer warranty Max output power: 27V 0.8A. Connector type: Circular connection point Not for 18V devices – This adapter is only compatible with 27V units. Do not use with 18V models to avoid incompatibility or damage Fit for Sharper Image Model 1011666 1013983 1013985 2437599 1014392 2313786 2316222 1013002 1012667 Massage Gun