Certification: ROHS Use : Mobile Phone, Aviation, Computer, DJ, Gaming, Sports, Travel, Professional Model : CEL-M3 Function: Bluetooth, Waterproof, Noise Cancelling, Microphone Wireless Type: Bluetooth Place of Origin : Guangdong, China Support Memory Card : Yes Cord Length :1.2m Vocalism Principle: Dynamic Bluetooth Standard : Bluetooth v5.0 Volume Control : Yes Waterproof Standard : IPX-6 Control Button : Yes Active Noise-Cancellation : Yes Codecs : AAC Bluetooth virsion : Qualcomm QCC 3003 Model Number : M3 Support agreement : A2DP AVRCP HSP HFP Aptx Style: Headband Frequency : 2.400GHz- 2.480GHz Communication : Wireless+Wired Working scope : >= 10m Standby time : 300hours Battery capacity : 400mA Charging standard : Micro USB,DC5V,650mA Talking time : 40 hours Charging time : Approx 1.5hours Music time : 40 hours (80% volume)