Features:● Support phone / tablet / PC of Android system， iOS system， and all Bluetooth audio devices etc.
● Can connect two devices at the same time
● Support noise elimination and echo cancellation
● Support hands free call
● Support stereo codec， AUX output
● Plug and play， no need to install

Specifications:
● Bluetooth specification: 4.1
● Support Bluetooth Protocols: AVRCP， A2DP 1.3， HFP， HFP1.6， HSP1.2， SPPV1.2
● Operating distance: 10m and more
● Working current: Less than 20mA ?
● Standby current: Less than 20mA
● Built-in battery: 300mAh
● Charging current: 250mAh
● Working time: 8 - 10 hours
● Standby time: 15 hours?
● Charge time: 3 hours
● Charge port: Micro USB 5V / 0.5A Package weight: 0.167 kg
Product Size(L x W x H): 11.00 x 6.50 x 2.00 cm / 4.33 x 2.56 x 0.79 inches
Package Size(L x W x H): 14.50 x 12.00 x 3.00 cm / 5.71 x 4.72 x 1.18 inches Package Contents: 1 x Receiver， 1 x USB Cable， 1 x RCA Cable， 1 x 3.5mm Audio Cable， 1 x Bilingual User Manual in English and Chinese