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Description: Application: This under pillow speaker can accompany you to sleep, and it will turn offter 30 minutes, so you can focus on your sleep. Safe to use: Built-in polymer battery, this wireless loudspeaker is rechargeable and features a dual MOS battery protection circuit. Comfortable to use: With a small and thin bar appearance, this under pillow speaker wont make you feel uncomfortable while sleeping. Advance technology: Adopts bone conduction technology, this wireless stereo speaker will provide a clear sound to you, and it wont easily disturb other people. Easy to use: With a bluetooth-compatible 5.0 function, you can connect this under pillow speaker to a phone and start to play your soothing music to help you sleep. Specification: Bluetooth-compatible version: 5.0. Connection range: Approx. 10m/32.81ft. Material: Plastic. Working voltage: 3.7-4.2V. Vocalism unit: Bone conduction. Frequency response range: 40Hz-20KHz. S/R rate: ≥75dB. Battery: Polymer battery, 400mAh(Built-in). Music play time: About 20 hours. Standby time: About 300 hours. Charging voltage: 5V, 400mA. Charging time: About 2 hours. Size(LxWxH): Approx. 15.5x3.6x1.2cm/6.10x1.41x0.47 inch. Channel: 2. Audio crossover: Full-range. Input power: 25W. Rated power: 4W. Impedance: 2Ω. Sensitivity: 32dB. Total Harmonic Distortion: 1%. Note: There might be a bit of color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Speaker(with 1 Piece Charging Cable, 1 Piece User Manual). Description: Portable: The sleeping speaker is compact and does not occupy any space, making it easy to carry around. Light weight: The sleep speaker adopts a 60G lightweight design, with a flattened shape. It can be placed under the pillow without any foreign objects and has no tion of sleep. Long term battery life: Continuous playback for 20 hours, 400MAH rechargeable polymer battery, fully charged in just 40 minutes. Scheduled shutdown: Double click the M button to turn on the scheduled shutdown without the need to wake up at night and wake up until dawn. Bluetooth-compatible 5.1: Adopting imported chips, equipped with high-performance chips for fast response, stronger anti-interference, low power consumption, and fast speed. Specification: Material: ABS+surface components Color: White, black. Size:Approx.18x7x4cm/7.08x2.75x1.57 inch. Package Includes: 1 Piece Bluetooth-compatible Sleep Speaker Sleep Aid. Description: Bone conduction: This under pillow speaker can transfer the audio via the bone, so it wont easily disturb others while working. Long work time: Built-in large capacity polymer battery, this wireless loudspeaker can provide 20 hours of music playing time and has 300 hours of standby time. Easy to connect: Support bluetooth-compatible 5.0, this under pillow subwoofer is easy to connect with most types of phone and tablets. Auto power off: This bone conduction wireless speaker will turn ofutomatically after 30 minutes, so you dont need to turn it off manually while sleeping. Other function: This under pillow sound box supports a memory card, which allows you to play MP3 music directly from the memory card. Specification: Bluetooth-compatible version: 5.0. Connection range: Approx. 10m/32.81ft. Material: Plastic. Working voltage: 3.7-4.2V. Vocalism unit: Bone conduction. Frequency response range: 40Hz-20KHz. S/R rate: ≥75dB. Battery: Polymer battery, 400mAh(Built-in). Music play time: About 20 hours. Standby time: About 300 hours. Charging voltage: 5V, 400mA. Charging time: About 2 hours. Size(LxWxH): Approx. 15.5x3.6x1.2cm/6.10x1.41x0.47 inch. Channel: 2. Audio crossover: Full-range. Input power: 25W. Rated power: 4W. Impedance: 2Ω. Sensitivity: 32dB. Total Harmonic Distortion: 1%. Note: There might be a bit of color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Speaker(with 1 Piece Charging Cable, 1 Piece User Manual).