1. LED light irradiation range: 20-40 meters, the maximum brightness of LED lights can reach 1.2 watts! ! 4 bright , the brightest 200 2. The latest Bluetooth V5.2 chip, high-fidelity stereo, shocking bass effect, clear and stable calls 3. Ultra-low power consumption, continuous music playback for 24 hours (100% maximum volume test for 7) 4. The transmission rate is fast and stable, and the unobstructed transmission distance exceeds 20 meters 5. There are English voice prompts for power on, power off, successful pairing, low battery, maximum volume, etc. iOS system can display power and activate SIRI intelligent voice assistant. The hat is made of high-grade artificial wool-acrylic fiber, which is environmentally friendly and does not fade, shrink or deform. It is double-layer knit, with flanging design, high-grade brown PU leather label, high-end fashion, and a layer of waterproof PVC film is under the leather label. The ear part of the hat For embroidery craft, high-end atmosphere! 5 levels of LED lighting effects: medium brightness, high brightness, slow flash, fast flash, red and blue lights flashing. Bluetooth specification:V5.2+//A2DP/AVRCP/HFP Frequency range:2.4026GHz-2.480GHz Transmission distance:more than 20 meters Channel:Stereo Speaker parameters:24 ohm/30mm Speaker power:10 mWx2 Signal-to-noise ratio:104dB Functions:previous song, song, volume up, volume down, play, pause, answer call, make call, activate SIRI, microphone intercom Battery capacity:400mAh Playing time:24 hours (100% volume test of mobile phone) Call time:more than 24 hours Standby time:more than 500 hours (actual test) Charging time:about 2 hours Colour:B:Black Material:Acrylic Package Contents: 1 * Cap Light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.