ITEM NAME:L21pro Waterproof Wireless Bluetooth Headset In-ear Stereo Music Earphones Product Description Description: L21pro Waterproof Wireless Bluetooth Headset Sports Bluetooth 5.0 Headphones In-ear Stereo Music Calling Earphones with Charging Box Specification: Model: L21pro Material: ABS + PC Colour: Black Bluetooth version: 5.0 Impedance: 32ÃŽ © Sensitivity: 123dB Frequency response: 20-20kHz Waterproof level: IPX5 Charge battery power: 450mAh Headphone capacity: 50mAh Play time: 4h Standby time: 100 hours Charging interface: Micro USB interface Effective distance: 10m/32.8ft Charging power supply: Input AC 110-240V, output DC 5V Weight: 70g Packing size: 10x8x4cm/3.94x3.15x1.57in Functions: Answer incoming calls, hang up incoming calls, (listen to music) pause/play, voice report number, tail number redial, report call number, intelligent voice prompt, power display, noise reduction Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement. Included: 2 X Headphones 2 X Charging Cables 1 X Manual.Model: L21pro. Bluetooth version: 5.0. Waterproof level: IPX5. Effective distance: 10m/32.8ft. Warranty Service. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.