Description: Function: BT audio receiving and transmitting combo;Built-in noise reduction HIFI sound quality;Transmission signal distance: 15m;Fully compatible with automatic matching;Built-in lithium battery: 300maWorking time: ≤8HInput interface: 3.5mm;Input voltage: DC/5V;Support hands-free callingLCD screen display Package Size: Gross weight of the whole box: 9.6 kgBox gauge: 50*22.5*38CMNumber of boxes: 150Bare metal weight: 22.1 gramsSingle machine outer packaging: 92.3*71*33MMGross weight of single machine: 60.1 gramsSingle bag weight: 49 grams For samll quantity,we will send out 2-5 days.For bulk quantity,and OEM order,we will send out 5-30 days as the case may be. All the goods will be fully checked and packaged well before shippment.