Fetal Doppler Mini Portable Holder Speaker with silicone speaker

Specification 

• Mini holder speaker
• Silicone speaker
• Inside rechargeable Li-on battery, 5 hours music playback
• 2-inch hifi full range speaker
• Frequency response: 80Hz – 20KHz
• SNR>60dB
• Power voltage: DC 5V
• Power supply: USB port, Li-on battery

Function

• Waterproof can be used in the bathroom
• Li-on battery inside
• Apply to mobile phone, MID, PC, etc

Certification: CE, RoHS