Specifications: 1) Pillow Case and Hood Material: 60% Cotton + 40% Polyester; 2) Inflatable Pillow Material: PVC 3) Bluetooth: BQB Certificated Bluetooth V4.1 Chip, with EDR Tech, 10M/33Ft Transmission Range; 4) Rated Power: RMS 10mW x 2; 5) Speaker Unit: 32Ω/10mm; 6) Frequency Response: 20HZ-20KHZ; 7) Battery: 3.7V Certificated High Quality 100mAh Rechargeable Li-ion Battery; 8) Standby Time: Over 60 Hours; 9) Play Time: Over 5 Hours; 10) Charge Time: DC 5V Approx 40 Minutes; 11) With Over current, Overcharge & Overheat Protection Design on PCB. Note: Don't Expose Product Liquids or Moisture. Don't Attempt to Tamper with Product by Dropping,Disassmbling,Opening or Scratching,ect Don't store the product near acidic or alkaline material. Keep the Product away from Fire.