Specificaions:
Bluetooth specification Bluetooth V4.1+EDR
Operation frequency 2.402-2.480GHz
Supported profile A2DP v1.2 AVRCP v1.4
Chip solution CSR8635
Operation range UP to 10 meters
Standby time About 250hours
Working time About 14 hours
Battery type 3.7V, 280mAh Lithium polymer Battery
Charge time About 2 hours
Overall dimensions Φ49*13mm
Net weight About 20g

Package includes:
1 x Bluetooth Receiver,1 x 3.5mm Audio Cable,1 x Micro USB charging cable,1 x User Manual

• Bluetooth Receiver, convenient to control, just connect the Bluetooth receiver with your device's headphone jack via the 3.5mm AUX and pair the Bluetooth with your phone, then start to enjoy your favorite music.
• Wireless: turn wired speaker, headphones, stereo system into wireless by connecting with this bluetooth adapter
• Bluetooth 4.1 with A2DP for high quality audio sound, can use while charging
• Built in battery for portable use, or connect to a USB power source for always-on application.
• Designed of unique appearance and made of high-quality materials, super clear conversation effect.

Bluetooth Receiver, convenient to control, just connect the Bluetooth receiver with your device's headphone jack via the 3.5mm AUX and pair the Bluetooth with your phone, then start to enjoy your favorite music.Cypress Digital