Specifications: Acrylonitrile Butadiene Styrene (ABS), 3.74 L x 3.74 W x 7.08 H inches, 0.95 pounds, true, SM-07, Shenzhen TingRu Technology Co., Ltd., cr2032
Features: Power on: Plug the device into a power source or use batteries. Select sound: Press the 'Sound' button to cycle through the 18 options. Adjust volume: Use the 'Volume +/-' buttons to choose from 30 levels. Set timer: Press the 'Timer' button to cycle through time options from 15 to 120 minutes.