For Mobile Phones & Tablets & Laptops, Support 32GB TF Card Maximum, B570

1. Wired and wireless, hands-free call, USB charging, Bluetooth signal, wireless card play. 2. Use LED display function to facilitate mode rotation and song switching. 3. Humanized removable battery design, standby battery can be replaced at any time, no power troubles. 4. Environment-friendly rubber head beam, light and flexible. 5. Folding structure design, easy to carry and storage.Specification: General Model B570 Types Headset (with mic) Bluetooth Version V2.1 + EDR Speaker 32ohm Speaker Power 1W Frequency Response 20Hz-20kHz Transmission Distance Up to 10m Distortion <=1% SNR >=80dB External Memory TF card up to 32GB (not included) Working Voltage 3.7V Charging Voltage DC5V Charging Current 35mA Battery Battery Types Li-ion Battery Capacity 400mAh Talk Time Up to 8 hours Music Time about 8 hours Standby Time 48 hours Package Weight One Package Weight 0.34kgs / 0.75lb One Package Size 18.5cm * 18cm * 11cm / 7.28inch * 7.09inch * 4.33inch Qty per Carton 20 Carton Weight 8.00kgs / 17.64lb Carton Size 48cm * 46cm * 42cm / 18.9inch * 18.11inch * 16.54inch Loading Container 20GP: 287 cartons * 20 pcs = 5740 pcs40HQ: 667 cartons * 20 pcs = 13340 pcs