Bluetooth version :5.0 Product size :50*50*31MM Charging time: about 4H Playback time: 6H Speaker TypeSubwoofer Connectivity TechnologyBluetooth 1. Bluetooth Speaker Long Standby: Specially designed for portable speakers. 6 hours of playtime is enough for any outdoor activity. Specifically designed for outdoor speakers. You can use it to determine the current playback mode and volume. Classic design, delicate and lightweight, easy to operate 2. Mini speakers are widely compatible: yet deliver crystal-clear sound, impressive bass and room-filling loudness with high-performance drivers and passive subwoofers. Small but powerful bluetooth speaker. Compatible with all Bluetooth enabled devices to connect to iPhone, iPad, Android and more 3. Pairing Bluetooth connection for the first time: The speaker can be automatically connected every time the Bluetooth speaker is turned on; AUX: 3.5mm AUX audio cable, connect to a computer, smartphone, TV, CD player, MP3, MP4, etc., to experience the presence of the theater. Connect to your smartphone or tablet in seconds, up to 33 feet away. Supports automatic reconnection to the last used device 4.M3 Speaker is Lightweight and Small: You can easily bring your bluetooth alarm clock to picnics, camping, hiking, beaches, parties and all kinds of outdoor activities. Versatile creative and modern design make it the gift for Christmas, Easter, Thanksgiving, Birthday, Anniversary, Mother's Day, Father's Day, Halloween and more