This device is a 2-in-1 Bluetooth transmitter and receiver. When used as a Bluetooth transmitter, the device can transmit audio from your mobile phone, television, computer… to a receiving device such as stereo headphones or Bluetooth speakers via Wireless technology. When used as a Bluetooth receiver, you can connect it for example with headphones, through the 3.5mm Jack port, or connecting speakers, and thus receive the audio signal via Wireless. Two devices can be paired between them, one as an emitter and the other as a receiver. Features: Supports protocols: A2DP, AVRCP Bluetooth reception distance: 10m Battery: 300mA Operating time: 7 hours or more Charging time: 2.5 hours Charging voltage: 5V Input/output connection mode: 3.5mm stereo Jack Compatible with Android and IOS phones and tablets Cables included: - 3.5mm stereo Jack cable - USB A to Micro USB