Documented specifications
Yealink · Manufacturer documentation available at review; remaining support period and local availability not established.
| Specification | Documented value |
|---|---|
| Display | 2.4-inch 240 × 320 color Source ↗ |
| Bluetooth | 5.1 Source ↗ |
| Headset | Bluetooth or 3.5 mm Source ↗ |
| Talk time | Up to 21 hours in ideal conditions Source ↗ |
| Standby | 166 h on V0; up to 320 h on V1–V4 in ideal conditions Source ↗ |
| Alerts | Vibration Source ↗ |
Unlisted fields remain unverified. Platform compatibility and remaining support life require confirmation for the exact ordered model.
What it is and why consider it
W78H offers a larger color display and Bluetooth headset support for mobile staff. Its standby rating varies by hardware generation, which matters when comparing used and new stock.
Reasons to choose something else
Use W73H when a smaller wired-headset handset meets the job. For rugged or environmental protection, compare W59R rather than assuming every business DECT handset has the same durability.
Deployment and acceptance checks
Test Bluetooth reconnect after charging and the visibility of caller information. Verify the base compatibility and hardware revision before using the advertised standby figure in staffing plans.
Record the ordered model, hardware revision, installed firmware and calling platform together. Confirm administrator and provisioning ownership before connecting a previously used device. Keep the previous configuration and a supported recovery method before changing firmware; an arbitrary downgrade can remove security fixes.
Firmware, support and evidence
Use the linked Yealink support resources to match the device to its approved firmware and provisioning instructions. The facts above come from manufacturer documentation; no hands-on measurements, current price or merchant offer are implied.
Where the table does not specify display, SIP-account capacity, network ports, PoE, Wi-Fi, Bluetooth, codecs, headset or expansion support, that field remains unverified for this record. A base station, handset and accessory have different responsibilities; do not copy a feature between them. Confirm lifecycle notices and support entitlement before a fleet purchase.
Sources & applicability
Primary references for the technical details above. Operational examples and planning checklists are VoIP.info editorial guidance.
Examples require adaptation to your topology. No live PBX or hardware testing is claimed.