Product parameters:
Type of memory card: TF card
Support TF card/U disk capacity: Less than or equal to32GB
Power supply: DC12-24V
Support file type: MP3/WMA/WAV/FLAC
Working current: 50-100ma DC12V
Bit rate: 64-320kbps
FM frequency range: 87.5-108MHZ
SNR: 85db (FM: 65db)
Harmonic distortion: <0.05% FM:<0.1%)
Suitable for model: DC12v-24v 
launching distance : <5 meters
Specification
General

Model: BT53 
Type: Car MP3 Player 
Connection: Bluetooth 
Interface: TF/Micro SD Card Slot,USB 2.0 
Material: Plastic
Power

Voltage: 12 - 24V
Product Details

Music Source: Bluetooth devices 
Micro SD/TF Card Expansion (Max.): 32GB 
U-Disk Expansion (Max.): 32GB 
SNR (dB): 85db 
Degree of Distortion (%): <0.05% 
FM Channel: 87.5-108MHz 
Bluetooth Version: V3.0 
Bluetooth protocol: A2DP 
Transmit Distance: 5M 
Media Format: FLAC,MP3,WAV,WMA 
Working Tempreture (Deg.): 0-60
Dimension and Weight

Product weight: 0.0340 kg 
Package weight: 0.0580 kg 
Product size (L x W x H): 6.60 x 2.60 x 7.80 cm / 2.6 x 1.02 x 3.07 inches 
Package size (L x W x H): 9.00 x 3.00 x 11.00 cm / 3.54 x 1.18 x 4.33 inches
Package Contents

Package Contents: 1 x Car MP3, 1 x English Manual