Computer Accessory Sets features: V300 pro sound card 10 sound effects bluetooth noise reduction audio mixers headset mic voice control for phone pc Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. The built-in battery has a long life and can be used for about 6-8 hours when fully charged. You can enjoy the live karaoke Specifications : model: V300 PRO Input Voltage: 5V Charging Battery Capacity: 1000 mAh colour:Black material: abs Size: 157 x 78 x 15mm / 6.18 x 3.07 x 0.5 inches In Parcel: 1 x Sound card 1 x Accompaniment line 1 x Live line 1 x Charging line Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.