Cardtype Bluetooth speaker with aluminum alloy housing provides portable wireless audio with versatile playback options Key benefits Reliable wireless connection up to 10 meters in open space; note that walls and buildings may reduce range Durable yet lightweight aluminum alloy body for everyday portability Flexible playback: Bluetooth connection or card playback supported Clear stereo performance from a compact 36 mm driver with a frequency range of 20 Hz to 20 kHz Easy operation with a simple buttoncontrolled interface Ready for quick charging from a 5 V supply; nominal voltage 3.7 V and battery capacity of 300 mAh Compact design suitable for travel, home, or office use Core specifications Transmission range: up to 10 meters in open and unobstructed environments; walls and buildings may affect signal Bluetooth specification: 5.0 Play time: approximately 1 to 3 hours Battery: 300 mAh Battery nominal voltage: 3.7 V Charging voltage: 5 V Speaker: 4 ohm, 3 W Speaker diameter: 36 mm Frequency response: 20 Hz to 20 kHz Sound output type: cardtype Bluetooth speaker Adjustment method: button Functional features: Bluetooth connection, card support Design and materials Material: aluminum alloy housing for durability and lightweight handling Compact driver size with a 36 mm diameter for portable use Simple button controls for quick operation Power and charging Battery capacity 300 mAh provides up to 13 hours of playback depending on volume Rechargeable via standard 5 V power source Usage and compatibility Bluetoothenabled devices (phones, tablets, laptops) can connect via Bluetooth 5.0 Card playback supported for offline music playback when a card is inserted Use scenarios Home or office desk: place on a table to enjoy music or audio from a paired device without wires Outdoor activities: take along on picnics or walks; stay within Bluetooth range to stream audio from a phone or other device Travel or commuting: compact form factor fits into bags or backpacks; convenient for music on the go How to use (basic) Turn on the speaker and enable Bluetooth on your device Pair the device and start playback To use card playback, insert a compatible card and use the button controls to select playback This description preserves the original product features and specifications while presenting clear, customerfriendly information.