The Hm20 Wireless Bluetooth Speaker is a mini, nostalgic loudspeaker with stereo music and subwoofer capabilities. It features a compact design, available in yellow, pink, blue, and red colors. The speaker has a net weight of 250g and dimensions of 48*62*28mm. Technical specifications include no microphone, Bluetooth connectivity with V5.0 version, a transmission distance of 10m, 2W output power, 3 impedance, 60-18kHz frequency response, and a 550mAh, 3.7V battery capacity. Charging time is 2-3 hours, working time is 6-8 hours, and standby time is 100 hours. The package includes the speaker, a USB charging cable, manual, and lanyard.