Wireless earphones with noise-canceling function, compatible with Bluetooth Ver. 5.4 Color: Pink ⭕️ Immediate purchase without comment is welcome! ❌ No price reduction Brand new, unopened ⚠️ Some people check the operation after receiving the item, but since it is unopened, please contact the manufacturer directly for initial defects. Returns and exchanges are not accepted. This is an amusement prize, so there may be initial defects. Please purchase only if you understand this. We will protect it from water damage and carefully package it, and ship it via Yu-Packet Post Mini. - Model Name: Revolution-ANC - Bluetooth Version: Bluetooth Ver. 5.4 - Driver Size: 10mm - Frequency Response: 20Hz〜20kHz - Waterproof Standard: IPX4 - Battery Type: Lithium-ion battery - Charging Port: USB Type-C - Weight: Approximately 10g - Operating Temperature: 0℃〜50℃ - Material: ABS