Key benefits Small yet powerful: a compact cardtype Bluetooth speaker with a 4 Ω 3 W driver for clear audio output in a portable package. Durable build: aluminum alloy housing delivers a feel with solid durability. Stable wireless connection: Bluetooth 5.0 for reliable pairing with compatible devices and up to 10 meters of range in open space. Flexible playback options: supports Bluetooth audio and card playback for offline music, increasing compatibility with different sources. Long enough playback on the go: battery capacity 300 mAh provides roughly 1–3 hours of play time, depending on usage. Easy operation: simple control buttons for quick adjustment and playback management. Convenient charging: operating voltage 3.7 V, charging voltage 5 V for straightforward power replenishment. Product overview This cardtype Bluetooth speaker combines a compact 36 mm diameter driver with an aluminum alloy body to deliver portable sound with durable construction. It supports Bluetooth connection and card playback, allowing flexible use with Bluetoothenabled devices or music stored on a card. The device is designed for everyday listening with a focus on simplicity, reliability, and portability. Key specifications Voltage: 3.7 V Charging voltage: 5 V Speaker: 4 Ω, 3 W Diameter: 36 mm Frequency response: 20 Hz – 20 kHz Transmission range: up to 10 meters (in open space; walls and buildings may affect signal) Material: aluminum alloy Bluetooth specification: 5.0 Play time: about 1–3 hours Card support: yes Speaker type: cardtype Bluetooth speaker Adjustment: button Compatibility and controls Works with Bluetooth 5.0enabled devices such as smartphones, tablets, and laptops. Card playback supported for music stored on compatible memory cards. Simple button controls for quick power on/off, playback, and source switching. Use scenarios listening on the go: pair with a smartphone during commutes or workouts for wireless audio without needing to carry larger speakers. Desk or study setup: place on a desk for convenient Bluetooth connection to a laptop or tablet, or use card playback for offline listening. Travel and outdoor activities: compact, lightweight design with a sturdy aluminum body is suitable for travel, camping, or picnics where space is limited and quick access to music is desired. Notes Bluetooth range and performance can vary by environment, particularly with walls, furniture, and other obstructions. Battery life depends on volume level and content; higher volumes reduce play time within the stated range. This description preserves the original product's specifications and features while presenting a clear, professional, and customerfocused overview suitable for conversion.