Bluetooth project: BC4 audio ROM projectBluetooth chip: BC213159A20Work frequency: ISM 2.4GHz-2.48GHzBluetooth specification: V1.2Support profiles: headset 1.1 and handsfree 1.5RF output power: -6~+4dbm (class 2)RF sensitivity: >-75dbmDistance: within 10mWork Indicator: LED (blue and red)Audio frequency output power: (RL=32 ohm) 2.5mWOperate temperature: -10°C~+45°CStorage temperature: -20°C~+45°C producing area:China