Features: Brand new new and high quality Bluetooth 5.0; the latest Bluetooth V5.0 chip; high-fidelity stereo; the effect is shocking; the call is clear and stable. Can be removed for cleaning. Ultra low power consumption; continuous playback of music for 13 hours (for Apple 7 mobile phone maximum volume test). The transmission rate is fast and stable; and the unblocked transmission distance is more than 20 meters; up to 50 meters. English voice prompts for power on; power off; pairing success; low battery; maximum volume; etc. The iOS system can display power and activate the SIRI Smart Voice Assistant. Side zipper design; can be equipped with hot/cold dual-use ice packs. Description: Bluetooth specification:V5.0+EDR/A2DP/AVRCP/HFP Frequency range:2.4026GHz-2.480GHz Transmission distance:20 meters or more Channel:Stereo Speaker parameters:32 ohms / 30mm Speaker power:10 mW*2 Signal to noise ratio:104dB Microphone intercom Play time:13 hours (for apple mobile phone volume test) Talk time:14 hours or more Standby time:350 hours or more Charging time: 2 hours or so Packaged size:18*8.5*3cm Package included: 1*Bluetooth headset 1*Sleep scarf 1*USB charging cable 1*Instruction manual Note: Due to the difference between different monitors; the picture may not reflect the actual color of the item. Thank you!