ITEM NAME:Bluetooth v5.0 Stereo Audio Adapter Wireless Receiver For HFP/HSP/A2DP/AVRC Q4B3 This product is mainly used for short-distance wireless music transmission. Bluetooth reception mode can easily connect with Bluetooth devices of notebook computers, mobile phones, PDA and other digital products to achieve wireless music transmission. Bluetooth Version: 5.0 + EDR Frequency range: 2.4 GHz-2.480 GHz Bluetooth Level: Class2 Support Bluetooth format: HFP/HSP/A2DP/AVRCP Bluetooth coverage: 10 meters Charging Voltage: DC 5.0V Working Current: