1. Bluetooth version: bluetooth V5.0 (drive-free plug and play)2. Music format: APE/FLAC/WAV/MP3/WMA3. Internal card capacity: support within 64G4. Body material: PC5. Transmission distance: about 10m without barriers6. Battery capacity: 300mAh polymer lithium battery7. Support protocol: AVRCP, A2DP8. Bluetooth mode: Bluetooth receiver, Bluetooth transmitter9. Various systems: support XP/Vista/Win7/8/10 system/IOS10. Output: DC 5V/2.1A11. Music level: HFI high-definition stereo12. Basic functions: Bluetooth receiver (RX)/Bluetooth transmitter (TX)/TF card playback/FM transmitter (87.5-108HMZ FM)13. Support equipment: speakers/cars/TVs/desktop computers/notebooks/wired headphones/power amplifiers/projectors, etc.14. Packing list: adapter, manual, charging cable (about 0.5m), 3.5mm audio cable (about 1m)15. Weight: about 35g16. Size: about 5.5x2.1x1.5 cmFeatures:1. High-definition LED digital display, the use status is clear at a glance, using fire-resistant PC material, high-gloss surface technology, comfortable hand feeling2. Small size, easy to carry3. Not limited to car models, plug in the car AUX interface/FM radio to connect to the Bluetooth of the mobile phone, support listening to songs/navigation/calls, the signal is stable and no noise4. Smart compatible devices, support devices with audio input/output interfaces5. Support TF card, plug and play, built-in smart decoder, can directly play music files in TF card6. Multi-function buttons, support switch machine/play/pause/up and down song/volume up/down/sound source switching/frequency adjustment7. Built-in bluetooth 5.0 chip, plug-and-play driver-free, strong compatibility, more stable connectionSpecification: Package Weight One Package Weight 0.12kgs / 0.26lb One Package Size 16.5cm * 12cm * 3.5cm / 6.5inch * 4.72inch * 1.38inch Qty per Carton 252 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 252 pcs = 44604 pcs40HQ: 412 cartons * 252 pcs = 103824 pcs