Compact aluminum alloy Bluetooth speaker with versatile playback options Key benefits and features Compact and durable build: aluminum alloy body with a diameter of 36 mm for easy portability and sturdy feel. Solid audio performance: a 4 Ω 3 W speaker delivers clear sound with a wide frequency range of 20 Hz to 20 kHz. Wireless and card playback options: Bluetooth version 5.0 for easy wireless pairing, plus support for card playback for convenient offline listening. Reliable wireless range: transmission range up to 10 meters in open space; performance may be affected by walls and buildings. Simple controls: easy operation via a single button for quick adjustments and playback control. Power and charging: battery capacity 300 mAh with nominal voltage 3.7 V; charging voltage 5 V; play time approximately 1–3 hours depending on usage. Specifications at a glance Speaker: 4 Ω, 3 W Diameter: 36 mm Frequency response: 20 Hz–20 kHz Transmission range: up to 10 meters (open space) Material: aluminum alloy Bluetooth: 5.0 Battery: 300 mAh Play time: about 1–3 hours Voltage: 3.7 V Charging voltage: 5 V Input method: button control Playback modes: Bluetooth connection and card support In the box Cardtype Bluetooth speaker with card playback support Userfriendly control via a single button 23 practical use scenarios Desktop music and calls: place on your desk to connect via Bluetooth to a phone or computer, or use card playback for a quick offline listening option during work or study. Outdoor and onthego listening: carry in a bag or pocket for park outings, picnics, or walks; enjoy wireless playback with a range suitable for open spaces. Travel and commuting: lightweight and compact design makes it convenient for short trips or daily commutes; switch between Bluetooth and card playback as needed without unplugging devices.