Features: Practical speaker allows you to listen to music, follow podcasts, have individual phone conversations or conference calls, and even enjoy an amazing experience of the sound of your games, videos or films played on your device. TWS (Ture Wireless Stereo) supported, just turn on both speakers in same time(package only include 1 speaker), then the speakers can paired each other automatically. FM radio build-in, suggest to use FM function outdoor, plug in USB cable as well. High sensitive microphone build-in. Case made with robust aviation aluminum alloy with shine CD pattern. Type-C charging port, the charging cable can be used with regular USB 5V charger, car USB charger. (not compatible fast charger) Equipped with 3pcs vmagnetic stickers for easy attach or remove. The versatile bone conduction speaker allows you to have a different but always spectacular experience of sound anywhere. Only 40mm in diameter, 38g in weight, slightly larger than a coin. Small size yet has large volume, which can reach up to 115dB. Packing list: humbird SPEAKER, Type C charging cable, high quality lanyard, re-usable nano glue sticker, magnetic sticker, rubber suction cup. Specifications: Quantity: 2pcs Color: Black/Red/Silver(Optional) Material: Metal BT ver: 5.0, A2DP, HFP Bone Conduction Transducer: 3Watt Frequency Range: 120Hz - 16kHz Battery: 400 mAh Polymer Battery Item Size: 40*40*24mm Item Weight: 38g/1.4oz Package Weight: 312g/11oz Package Size: 29*14.8*9.8cm Package List: 2*Speaker 2*Lanyard 2*Type-c cable 2*Suction cup sticker 2*Sticker 6*Magnetic sticker 2*Manual(English)