product description Product specifications: Size 70x45x25mm &nbsp; Weight 120g 1. Output power: 3WTHD: 10% 2. Sensitivity ratio: 360mv 3, signal to noise ratio: 80 decibels 4. Input power: DC5V/500 mA 5. Frequency: 120HZ-20KHZ 6. Bluetooth version: Bluetooth 3.0+ EDR Package Included: 1 smart watch speaker B90 1 USB charging cableConnection method Bluetooth connection Interface Type Card Reader Battery capacity 400mA Frequency response range 120HZ-20KHZ Output power 3W Signal to noise ratio ___75dB Power supply mode Built-in lithium battery Channel 2 Play time 6 hours Extended storage 8GB Bluetooth Protocol 3.0 Number of speakers 1 Effective distance 10 meters Features Waterproof, drop-proof, voice prompt, card, radio, dustproof, call function Mode of operation Applicable people Display Play format MP3, APE, WMA, FLC, WAV Shell material plastic Whether to support APP or not Support format TF card Speaker adjustment mode Is there a radio function? Box material plastic Appearance size 57.5*48.5*37 Packing list Bluetooth watch speaker Data cable Instruction manual Power mode USB Color red, iron ash, sky blue, rose gold, business silver<img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/15572448/743207461150.png" style="max-width:100%;">

B90 wireless bluetooth speaker outdoor sports watch audio portable collection MP3