KZ S1 S1D TWS True Wireless Bluetooth 5.0 Earphones Dynamic Hybrid Bluetooth Wireless Headset KZ S1D, Mobile Phones & Gadgets, Other Amazon.com: TWS KZ Z3 True Wireless in Ear Earbuds Bluetooth 5.0 Jual KZ S1 Knowledge Zenith Hybrid Bluetooth 5.0 TWS Headset Gaming KZ S1 and KZ S1D "true wireless" earphones video review Porta Fi. Channel: 2 Bluetooth version: 5. 0 Color classification: green, white, black, grey Headphone category: true wireless headphones How to use: in ear Standby time: 5 days Transmission radius: 15m Connection between the left and right cavities of the earphone: wireless connection Headphone and playback device connection method: Bluetooth connection