1, Super Loud and Bassy! 2, Smallest speaker in the world. 3, With 4G SD TF card 4, Best choice for Gift ... , $19.88-$30.00each 2, Super Loud and Bassy!3, Smallest speaker in the world. 4, With 4G sd card.5, Best ... and other audio sources Technical parameters Voltage: 3.7V Capacity: 400mAh Charge voltage: 5V Speaker Specifications: 40mm 2.6Ω 3w Frequency response ...