Features: 2 in 1 bluetoo adapter: receive and transmit 2 in 1No plug and play drivers required compatible smart bluetoo 5.0 built-in noise reduction high fidelity sound quality 10 meter stable transmission signal; fully compatible with auto match The body size is only 78x23mm, and the thickness is only 16mm It’s easier to carry around, and the receiving mode (RX) changes to Bluetooth speakers in seconds Specification: Input voltage: dc/5v Input interface: 3.5mm audio Transmission distance: 10 meters Driver: no installation required; Charging time: 1 hour Game time: 5 hours Bluetoo protocol: a2dp/avctp/avdtp/avrcp Battery: li-in 501535 3.7v-4.2v (220mah) Package: 1 * bluetoo transmitter receiver 1* charger cable 1*manual