Why choose our chest massager? 1.Ergonomic design ♥Basing one ergonomic principles, using the encircle design, fitting to the chest line closely. Quality material, skin-friendly, offers comfortable feeling while massage. 2.Excellent results ♥2 modes adjustment, strong massage force, stimulate collagen's secretion and activate breast, improve the chest skin elasticity, lift up and firming, excellent breast enhancement effect. 3.Wireless design ♥It lightweight, easily carry and use. It can be used for different body parts, which can reduce fatigue and allivate shoulder neck pain. Specification: Material: ABS, TPR Power Supply: 3 * AAA battery(Not Included) Working Voltage: DC 4.5V Working Current: 650mA Power: 3w Size: Approx.11.5 * 11.5 * 11cm / 4.5 * 4.5 * 4.3in Weight: Approx.223g Package List: 1 x Massager yty Precautions: 1. Do not use the machine while sleeping. 2. If you feel any discomfort during use, please stop the operation immediately. 3. When the battery is low or the machine is deactivated for a long time, please take out the battery to avoid damage to the machine due to battery fluid. 4. Please don't use the battery together. 5. Wipe with a dry cloth when cleaning. Do not wash with water. 6. Keep away from children and fire sources when storing to avoid danger.