Feature: 1. BONE CONDUCTION: The speaker adopts bone conduction technology, which utilizes bone conduction to vibrate the sound generator, as well as adaptive noise reduction technology. No need to wear it to deliver clear music to human ears, no need to worry about the sound affecting the surrounding family. It can be connected to your cell phone by Bluetooth or inserted into a memory card with 8‑32GB of stored songs. (Note: This product does not come with a memory card) 2. FALL FAST TO SLEEP: Bone conduction pillow speakers are designed to relieve insomnia without loud, annoying or ear damaging volume, just like a soft whisper in your ear, helps relieve stress and helps to fall asleep faster. For a better experience, sleep on your side, not on a latex pillow. 3. LIGHTWEIGHT AND PORTABLE: The under pillow speaker is mini and thin, so you won't feel any foreign body sensation or discomfort. You can easily carry it when you are traveling or on a business trip, and it won't take up too much space. Help you create a comfortable sleep and get rid of insomnia. 4. EASY TO USE: The speaker adopts a new generation of Bluetooth 5.3 chip, which can be effectively connected within 10 meters, low power consumption, zero delay, more stable and clear sound. Convenient Type C charging, long press to turn on, wait for Bluetooth pairing, you can play music after successful connection, and you can automatically connect to your cell phone when you use it in the future. Press the button with voice prompts, easier to operate. 5. LONG STANDBY TIME: The pillow speaker has a built in 500mAh battery, which can run continuously for up to 20 hours after a full charge, and the maximum standby time is up to 12 days. Simply press the timer button on the controller to switch between 30/60/90 minutes timer, free your hands and bring you a peaceful sleep. (Product comes with Type C charging cable) Specification: Item Type: Pillow Speaker Product Material: ABS Main Body Size: Approx. 132x52x10mm / 5.2x2.0x0.4in Battery: 500mAh Polymer Lithium Ion Battery (built In) Bluetooth: BT 5.3 Memory Card Slot: Maximum Support 32GB (without Memory Card) Support System: for iOS, for Android, for Windows, for Win7, for Win10, for OS X System (genuine) Music Format: MP3, FLAC, WMA, APE, AAC Timing: 30/60/90 Minutes Timer Folder Playback: Support Features: Innovative Dual Mode Playback (External Sound Playback, Bone Conduction Playback), Timer Shutdown, Can Make Calls. Package List: 1 x Speaker 1 x Lanyard 1 x USB Cable Note: All data are measured manually, and there are certain errors in the measurement results.