1. It can be connected to speakers or headphones that support Bluetooth (A2DP protocol) (in TX state), or connected to a mobile phone or computer (in RX state).2. supports for BTI-029 (dual stream) from one to two functions (one BTI-029 can connect two speakers or headphones at the same time and listen to music at the same time), BTI-029 also supports multipoint connection.3. It is compatible with APT-X BTI-029, and other CODECs.4. BTI-029 supports fiber input and fiber output.5. Supports A2DP AVRCP protocol. It can be connected with Bluetooth speakers or headphones that support the A2DP protocol to form a wireless audio transmission network for use on TV, CD, home theater, etc. They can also be connected to mobile phones / computers to play music.Specifications:Bluetooth version is: V 50Transmit : Class II, 10 meter range of use (actual range depends on the equipment connected to it)Frequency range: 2402 ~ 2480GHzMemory unit: 16M Flash memory unitSupport Bluetooth Security keys are: 0000, 1111, 1234, 8888Reception Status Usage Time: About 15 hours for AUXThe use time of the launch state: about 15 hours for AUXReceive Status Usage Time: About 12 hours for SPDIFLaunch Status Usage Time: About 12 hours for SPDIFCharging time: about 2 hoursCharging requirements: 5V DC greater or equal to 300MABattery: 350mAh Li-ion polymer rechargeable batteryOperating temperature: -10 C-55 Ccolour: blackMaterial: metal + plasticsize: 60x60x184mmPackage Contents:1 x bluetooth adapterOnly the above package content, other products are not included.Note: Light 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.