BT-21 NFC Bluetooth-compatible Receiver Transmitter 3.5mm AUX Jack RCA Wireless Adapter for Car Audio Speaker

• Support all kinds of old-style audio, home audio and other equipment, and upgrade ordinary audio to Bluetooth-compatible audio
• The Bluetooth-compatible 5.0 protocol makes audio analysis capabilities stronger
• Low delay speed, more stable signal transmission
• Built-in NFC sensing chip, close to the automatic pop-up connection, compatible with all kinds of NFC function phones, reducing cumbersome operation
• High fidelity audio transmission, enjoying high-definition layered audio quality
• 15m long distance transmission, easy to enjoy wireless connection

Specifications:

• Product interface: RCA/AUX
• Bluetooth-compatible version: Bluetooth-compatible 5.0
• Connection range: 15m
• Battery capacity: 200mAh
• Working hours: receiving 8h/transmitting 5h
• Frequency range: 10Hz-20HKz
• Signal to noise ratio: less than 110dB