Features: 1. HD Calling, High Volume, In-Car Music Playback 2. Built-in 4Ω 3W High-Quality Bass and HD Speaker (Chinese and English Voice Prompts) 3. Multifunctional Digital Display (Displays Frequency, Battery Level, Volume, Number of Songs on TF Card) 4. FM Transmitter Function (Can be Received by Car Radios/Other Radios) 5. Card Reader Transfer (Connect to Computer via Cable/Can Read Cards for File Transfer) 6. Instantly Transforms into Computer Speakers (Can be Used as Computer Speakers with a Cable Connection) 7. Smart One-to-Two Connectivity (Bluetooth Multipoint Connection Technology, Connects Two Phones Simultaneously, Supports All Audio Playback from Phones) 8. Supports TF Card Music Playback (Can Play Music Without Connecting to a Phone) 9. TYPE-C Charging Port (Supports Charging, Computer Connection for Audio Input and File Transfer) 10. Bluetooth Version 5.4 (Newly Upgraded Bluetooth, Lower Power Consumption, Faster Speed) 11. 1000mAh High-Capacity Battery (Continuous Music Playback/Calling for About 30 Hours, Voice Prompt for Low Battery, No Need to Worry About Running Out of Power, Can Be Used While Charging) Specifications: Bluetooth Version: 5.4 Bluetooth Range: 10 meters Speaker: 4Ω 3W Frequency Range: FO-14.5KHZ ±15%, Average SPL ±10db Charging Voltage: 5V Charging Current: 200mA-300mA Operating Voltage: 3.7V Operating Current: 10mA~20mA FM Transmission Frequency Range: 87.5-108.0MHZ FM Transmission Range: 10 meters Battery Capacity: 1000mAh Net weight: 83g Charging time: about 2 hours Talk time: about 30 hours Continuous music playback time: about 30 hours Battery capacity: 1000mAH Wireless version: 5.4 Wireless receiving distance: 10 meters FM transmitting distance: 10 meters Product size: about 12.3x5x2cm (4.84 x 1.96 x 0.78inch) Speaker: 4 ohms 3W Packing included: 1 x Bluetooth 5.4car kit (with 32GB TF/SD Card) 1 x Micro USB charging cable 1 x visor clip 1 x user manual