| Specification | Technical Details |
| Brand | HOCO |
| Model | S21 |
| Available Color | Yellow |
| BT Specification | BT v5.0 (Actions ATS3015 Chip) |
| Latency Logic | 45ms Professional Low-Latency |
| Battery (Case) | 320mAh |
| Battery (Headset) | 40mAh (Left & Right) |
| Charging Cycle | Case: 1.5 Hours / Headset: 1 Hour |
| Playtime / Calls | 4 Hours |
| Standby Duration | 120 Hours |
| Total Weight | 43g |
45ms Professional Low Latency: Engineered by HOCO with the Actions ATS3015 chipset to eliminate audio delay, providing a high-speed advantage for competitive gaming.
BT v5.0 Dual-Switching Logic: Features advanced leader-follower switching technology for a more stable wireless connection and seamless integration with voice assistants.
Integrated Gaming LED Matrix: Designed with high-visibility cool LED lights on both the headsets and the charging case for a premium gaming aesthetic.
Extended Dual-Battery System: Includes a 320mAh high-capacity charging case and 40mAh headset cells, providing a reliable power matrix for 4 hours of playtime.
Ultra-Lightweight 43g Chassis: Constructed with a compact and ergonomic structural frame, ensuring comfort and portability for long-duration gaming sessions.