The Archer R8 PRO has 8 high-precision PWM channel outputs and features excellent Anti-interference performance when it comes to spark-ignition on internal combustion models. It supports full-range signal strength with dual detachable antennas that assure optimal antenna reception and maximum range. In addition to all this, the R8 Pro can also be used as a redundancy receiver along with any other FrSky ACCESS capable receiver equipped with a SBUS port.

All of the Archer receivers are hyper-matched with the ACCESS protocol. They not only feature wireless firmware upgrades, increased range, and telemetry performance, the R8 PRO now supports more functions like configurable telemetry power, S.Port/F.Port switching and FLR output. Additional valuable features are under development to unlock the true potential of the ACCESS protocol.

FEATURES

ACCESS protocol with Over The Air (OTA)
Anti-interference in spark-ignition
Supports signal redundancy (SBUS In)
Full control range with telemetry
S.Port / F.Port
External battery / device voltage detection

SPECIFICATIONS

Dimension: 47*26*15mm (L*W*H)
Weight: 13g
16/24 Configurable SBUS Channels
8 High-precision PWM Channels
Operating Voltage Range: 3.5 -10V
Operating Current: 55mA@5V
Control Range: Full range* with telemetry
(*Full Range: ＞2km, range may vary based on local conditions.)
Voltage Measurement Range via AIN2 (External device): 0-36V
Compatibility: All FrSky ACCESS transmitters

From: https://www.horusrc.com/en/frsky-2-4ghz-access-archer-r8-pro-receiver.html