The invisible breast pump is small and lightweight to place inside your bra. Hands-free, more enjoyable and discreet way to express breastmilk. Features: Wearable breast pump, small and lightweight to place inside your bra, hands-free, more convenient to use. No tubes, no cords, no dangling bottles. No more pumping schedule. Pump anywhere anytime as you want to. All-in-one device. 3 modes (massage, express, mixed), each mode has 9 levels adjustable, choose the most comfortable level. Ultra-silent technology which create an atmosphere of flow vibration and low noise brings comfort to both baby and mother. Easy to assemble, and the components can be cleaned and disinfected in boiled water or steam except the motor. One-way flow, no reverse flow. Anti-reflux design, reduce pollution. Built-in 1100mAh large capacity lithium battery, suitable for working, traveling and more. Made with food-grade plastic and silicone, BPA-free and safe, -20~110 cold and heat resistant and with no smell. Note: 1. The default working time is 30 minutes, beyond which the breast pump will automatically shuts down or touch the power button to turn off the power. 2. It can not be charged over 24 hours, otherwise it will be damaged easily. 3. Press level + or - : If the indicating light flashes for once, it means level change successfully. If the indicating light keep flashing,it means it is the lowest level (level 1) or highest level (level 9). 4. There is a small hole in the top of the suction cup for pouring the pumped milk. (As picture shows) Specifications: Nipple Part Diameter: 24mm/ 28mm (Optional) Quantity: 1 Set/ 2 Sets (Optional) Color: White/ Light Pink(Optional) Material: Silicone + ABS + EPM Mode: Massage, Express, Mixed Adjustable Level: 9 Levels Each Mode Noise: about 45~50dB Input: 5A 1A Battery Indicator: Green (31%-100%), Orange (11%-30%), Red (1%-10%) Built-in Battery: 1 * 3.7V 1100mAh Lithium Battery Cup Capacity: 240ml / 8oz Cup Diameter: 11.5cm / 4.5in Motor Size: 8 * 6.8 * 3.5cm / 3.1 * 2.7 * 1.4in Each Item Weight: 252g / 8.9oz Package List: (Each set includes the following) 1 * Pump Motor 1 * 240ml/8oz Cup 1 * Silicone Breast Cover 1 * Membrane 1 * Silicone Connector 2 * Duckbill Valve 1 * USB Cable (Type-C) 1 * User Manual (English)