Note: The product has built?in lithium battery. Specification: Item Type: Bluetooth Speaker_x000D_Material: Acrylic + Plastic_x000D_Model: C7 Bluetooth Speaker_x000D_Output Power: 3W_x000D_Bluetooth Version: 5.0_x000D_Transmission Distance: Approx. 10m/32.8ft_x000D_Speaker Power: 3.7V 600mAh_x000D_Specification: DC5A-2A_x000D_Height: Approx. 90mm/3.54in_x000D_Width: Approx. 68mm/2.68in_x000D__x000D_How to Use:_x000D_1. Press and hold the start button for 3 seconds to turn on, and press and hold again to turn off the phone. After turning on the phone, you can open the Bluetooth settings search of the mobile phone, and see the Bluetooth named C7 for connection (with Bluetooth memory function), and the audio can be played after successful connection._x000D_2. Memory card mode, after power on, insert a memory card with music files into the speaker and automatically switch to card reading music mode. After reading the card, it will automatically play the music in the card._x000D_3. TWS true wireless stereo playback, put two C7 card machines into Bluetooth mode, double-click the start button of one of them, this one will automatically search for the other machine to connect, after the connection is successful, a beep will sound and the conversion will be performed automatically It is the left and right channels of the speakers (this function requires 2 speakers and they are both turned on, double-click the start button of one of them to connect, and when one of them is turned off, the other speaker will shut down synchronously). Features: 1360 surround sound field, metal diaphragm and HIFI stereo sound quality, it will bring you an excellent listening experience. 2With LED light , flashing with the rhythm, multi?color lighting cycle alternately, 7 main colors and 256 color variations. 3Bluetooth 5.0 chip, lower power consumption, more stable, compatible with more Bluetooth devices, 32.8ft Bluetooth transmission distance. 4Built?in high?definition microphone, support hands?free call. Through double noise reduction processing, high?definition wireless communication can be realized. 5Compact size, this speaker can be held with one hand, lightweight and portable, convenient for you to carry around. PackageList: 1 x Bluetooth Speaker 1 x Charging Cable 1 x Audio Cable 1 x Manual