Because some clients misunderstand, here is an explanation: This is a Bluetooth o transmitter (not a Bluetooth music receiver) and is not used to connect cellphones. This transmitter is used to connect Bluetooth headsets or Bluetooth speakers. How to use it: 1. Use an AUX cable to connect the transmitter to a TV, DVD, or another device, then turn on the transmitter (press the button for about 3-4 seconds). 2. Turn on the Bluetooth headset and ensure it is ready to pair. 3. The transmitter will automatically connect to your Bluetooth headset or speaker, and the TV or DVD sound will play through the connected device. If you need a Bluetooth music receiver for a car or non-Bluetooth speakers, please search for Bluetooth Music Receiver separately. Introduction: The H-366T is designed to transmit o signals from TVs, DVDs, MP3 players, and similar devices to Bluetooth earphones or speakers using Bluetooth wireless technology. It enables high-quality wireless o experiences with simple operation. Connect the device to an o source using the included o cable; no additional setup is required after powering on. Features: 1. Compact round design, mini size, lightweight 2. Multipoint design allows connection to two Bluetooth devices simultaneously, such as one speaker and one headset 3. High-quality stereo transmission for clear o performance Specifications: Product Name: Multipoint Bluetooth Transmitter Model: H-367T Bluetooth Version: 4.0 Effective Range: Up to 10 meters Battery Life: Up to 5 hours Charging Time: Approximately 1.5 hours Product Dimensions: 45mm x 11mm Color: Black Weight: 15g Package Includes: 1 x Bluetooth Transmitter 1 x Charging Cable 1 x 3.5mm o Cable 1 x User Manual