Brand Name: Windaily Hand Instrument: Yes Voltage: ＜50V AC Electronic: Yes Power Supply: Battery powered Is Batteries Included: Yes Origin: Mainland China Material: Memory foam material Item Type: Massage & Relaxation Certification: CE Certification: FCC Certification: RoHS Model Number: Neck Massager Pillow Size: Medium Size: XLARGE Size: Small Size: Multi Size SML Size: Large Application: Neck Heart-warming Design: Memory foam material Vibration Massage Pillow: Lightweight and Portable Built-in lithium battery: 15-minute Auto Shut-Off Choice: yes semi_Choice: yes